Rename blacklist/whitelist internally. (#15620)

Avoid renaming configuration settings for now and rename internal code
to use blocklist and allowlist instead.

25 files changed, 189 insertions, 206 deletions

diff --git a/changelog.d/15606.misc b/changelog.d/15606.misc
index 44265fbf02..568c0d3fc5 100644
--- a/changelog.d/15606.misc
+++ b/changelog.d/15606.misc
@@ -1 +1 @@
-Update internal terminology for workers.
+Update internal terminology.
diff --git a/changelog.d/15620.misc b/changelog.d/15620.misc
new file mode 100644
index 0000000000..568c0d3fc5
--- /dev/null
+++ b/changelog.d/15620.misc
@@ -0,0 +1 @@
+Update internal terminology.
diff --git a/synapse/config/repository.py b/synapse/config/repository.py
index 655f06505b..f6cfdd3e04 100644
--- a/synapse/config/repository.py
+++ b/synapse/config/repository.py
@@ -224,20 +224,20 @@ class ContentRepositoryConfig(Config):
                 if "http" in proxy_env or "https" in proxy_env:
                     logger.warning("".join(HTTP_PROXY_SET_WARNING))
 
-            # we always blacklist '0.0.0.0' and '::', which are supposed to be
+            # we always block '0.0.0.0' and '::', which are supposed to be
             # unroutable addresses.
-            self.url_preview_ip_range_blacklist = generate_ip_set(
+            self.url_preview_ip_range_blocklist = generate_ip_set(
                 config["url_preview_ip_range_blacklist"],
                 ["0.0.0.0", "::"],
                 config_path=("url_preview_ip_range_blacklist",),
             )
 
-            self.url_preview_ip_range_whitelist = generate_ip_set(
+            self.url_preview_ip_range_allowlist = generate_ip_set(
                 config.get("url_preview_ip_range_whitelist", ()),
                 config_path=("url_preview_ip_range_whitelist",),
             )
 
-            self.url_preview_url_blacklist = config.get("url_preview_url_blacklist", ())
+            self.url_preview_url_blocklist = config.get("url_preview_url_blacklist", ())
 
             self.url_preview_accept_language = config.get(
                 "url_preview_accept_language"
diff --git a/synapse/config/server.py b/synapse/config/server.py
index 64201238d6..b46fa51593 100644
--- a/synapse/config/server.py
+++ b/synapse/config/server.py
@@ -115,7 +115,7 @@ def generate_ip_set(
 
 
 # IP ranges that are considered private / unroutable / don't make sense.
-DEFAULT_IP_RANGE_BLACKLIST = [
+DEFAULT_IP_RANGE_BLOCKLIST = [
     # Localhost
     "127.0.0.0/8",
     # Private networks.
@@ -501,36 +501,36 @@ class ServerConfig(Config):
         # due to resource constraints
         self.admin_contact = config.get("admin_contact", None)
 
-        ip_range_blacklist = config.get(
-            "ip_range_blacklist", DEFAULT_IP_RANGE_BLACKLIST
+        ip_range_blocklist = config.get(
+            "ip_range_blacklist", DEFAULT_IP_RANGE_BLOCKLIST
         )
 
         # Attempt to create an IPSet from the given ranges
 
-        # Always blacklist 0.0.0.0, ::
-        self.ip_range_blacklist = generate_ip_set(
-            ip_range_blacklist, ["0.0.0.0", "::"], config_path=("ip_range_blacklist",)
+        # Always block 0.0.0.0, ::
+        self.ip_range_blocklist = generate_ip_set(
+            ip_range_blocklist, ["0.0.0.0", "::"], config_path=("ip_range_blacklist",)
         )
 
-        self.ip_range_whitelist = generate_ip_set(
+        self.ip_range_allowlist = generate_ip_set(
             config.get("ip_range_whitelist", ()), config_path=("ip_range_whitelist",)
         )
         # The federation_ip_range_blacklist is used for backwards-compatibility
         # and only applies to federation and identity servers.
         if "federation_ip_range_blacklist" in config:
-            # Always blacklist 0.0.0.0, ::
-            self.federation_ip_range_blacklist = generate_ip_set(
+            # Always block 0.0.0.0, ::
+            self.federation_ip_range_blocklist = generate_ip_set(
                 config["federation_ip_range_blacklist"],
                 ["0.0.0.0", "::"],
                 config_path=("federation_ip_range_blacklist",),
             )
             # 'federation_ip_range_whitelist' was never a supported configuration option.
-            self.federation_ip_range_whitelist = None
+            self.federation_ip_range_allowlist = None
         else:
             # No backwards-compatiblity requrired, as federation_ip_range_blacklist
             # is not given. Default to ip_range_blacklist and ip_range_whitelist.
-            self.federation_ip_range_blacklist = self.ip_range_blacklist
-            self.federation_ip_range_whitelist = self.ip_range_whitelist
+            self.federation_ip_range_blocklist = self.ip_range_blocklist
+            self.federation_ip_range_allowlist = self.ip_range_allowlist
 
         # (undocumented) option for torturing the worker-mode replication a bit,
         # for testing. The value defines the number of milliseconds to pause before
diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py
index 19dec4812f..2eb28d55ac 100644
--- a/synapse/handlers/federation.py
+++ b/synapse/handlers/federation.py
@@ -148,7 +148,7 @@ class FederationHandler:
         self._event_auth_handler = hs.get_event_auth_handler()
         self._server_notices_mxid = hs.config.servernotices.server_notices_mxid
         self.config = hs.config
-        self.http_client = hs.get_proxied_blacklisted_http_client()
+        self.http_client = hs.get_proxied_blocklisted_http_client()
         self._replication = hs.get_replication_data_handler()
         self._federation_event_handler = hs.get_federation_event_handler()
         self._device_handler = hs.get_device_handler()
diff --git a/synapse/handlers/identity.py b/synapse/handlers/identity.py
index bf0f7acf80..3031384d25 100644
--- a/synapse/handlers/identity.py
+++ b/synapse/handlers/identity.py
@@ -52,10 +52,10 @@ class IdentityHandler:
         # An HTTP client for contacting trusted URLs.
         self.http_client = SimpleHttpClient(hs)
         # An HTTP client for contacting identity servers specified by clients.
-        self.blacklisting_http_client = SimpleHttpClient(
+        self._http_client = SimpleHttpClient(
             hs,
-            ip_blacklist=hs.config.server.federation_ip_range_blacklist,
-            ip_whitelist=hs.config.server.federation_ip_range_whitelist,
+            ip_blocklist=hs.config.server.federation_ip_range_blocklist,
+            ip_allowlist=hs.config.server.federation_ip_range_allowlist,
         )
         self.federation_http_client = hs.get_federation_http_client()
         self.hs = hs
@@ -197,7 +197,7 @@ class IdentityHandler:
         try:
             # Use the blacklisting http client as this call is only to identity servers
             # provided by a client
-            data = await self.blacklisting_http_client.post_json_get_json(
+            data = await self._http_client.post_json_get_json(
                 bind_url, bind_data, headers=headers
             )
 
@@ -308,9 +308,7 @@ class IdentityHandler:
         try:
             # Use the blacklisting http client as this call is only to identity servers
             # provided by a client
-            await self.blacklisting_http_client.post_json_get_json(
-                url, content, headers
-            )
+            await self._http_client.post_json_get_json(url, content, headers)
             changed = True
         except HttpResponseException as e:
             changed = False
@@ -579,7 +577,7 @@ class IdentityHandler:
         """
         # Check what hashing details are supported by this identity server
         try:
-            hash_details = await self.blacklisting_http_client.get_json(
+            hash_details = await self._http_client.get_json(
                 "%s%s/_matrix/identity/v2/hash_details" % (id_server_scheme, id_server),
                 {"access_token": id_access_token},
             )
@@ -646,7 +644,7 @@ class IdentityHandler:
         headers = {"Authorization": create_id_access_token_header(id_access_token)}
 
         try:
-            lookup_results = await self.blacklisting_http_client.post_json_get_json(
+            lookup_results = await self._http_client.post_json_get_json(
                 "%s%s/_matrix/identity/v2/lookup" % (id_server_scheme, id_server),
                 {
                     "addresses": [lookup_value],
@@ -752,7 +750,7 @@ class IdentityHandler:
 
         url = "%s%s/_matrix/identity/v2/store-invite" % (id_server_scheme, id_server)
         try:
-            data = await self.blacklisting_http_client.post_json_get_json(
+            data = await self._http_client.post_json_get_json(
                 url,
                 invite_config,
                 {"Authorization": create_id_access_token_header(id_access_token)},
diff --git a/synapse/handlers/sso.py b/synapse/handlers/sso.py
index 25fd2eb3a1..c3a51722bd 100644
--- a/synapse/handlers/sso.py
+++ b/synapse/handlers/sso.py
@@ -204,7 +204,7 @@ class SsoHandler:
         self._media_repo = (
             hs.get_media_repository() if hs.config.media.can_load_media_repo else None
         )
-        self._http_client = hs.get_proxied_blacklisted_http_client()
+        self._http_client = hs.get_proxied_blocklisted_http_client()
 
         # The following template is shown after a successful user interactive
         # authentication session. It tells the user they can close the window.
diff --git a/synapse/http/client.py b/synapse/http/client.py
index c9479c81ff..f1ab7a8bc9 100644
--- a/synapse/http/client.py
+++ b/synapse/http/client.py
@@ -117,22 +117,22 @@ RawHeaderValue = Union[
 ]
 
 
-def check_against_blacklist(
-    ip_address: IPAddress, ip_whitelist: Optional[IPSet], ip_blacklist: IPSet
+def _is_ip_blocked(
+    ip_address: IPAddress, allowlist: Optional[IPSet], blocklist: IPSet
 ) -> bool:
     """
     Compares an IP address to allowed and disallowed IP sets.
 
     Args:
         ip_address: The IP address to check
-        ip_whitelist: Allowed IP addresses.
-        ip_blacklist: Disallowed IP addresses.
+        allowlist: Allowed IP addresses.
+        blocklist: Disallowed IP addresses.
 
     Returns:
-        True if the IP address is in the blacklist and not in the whitelist.
+        True if the IP address is in the blocklist and not in the allowlist.
     """
-    if ip_address in ip_blacklist:
-        if ip_whitelist is None or ip_address not in ip_whitelist:
+    if ip_address in blocklist:
+        if allowlist is None or ip_address not in allowlist:
             return True
     return False
 
@@ -154,27 +154,27 @@ def _make_scheduler(
     return _scheduler
 
 
-class _IPBlacklistingResolver:
+class _IPBlockingResolver:
     """
-    A proxy for reactor.nameResolver which only produces non-blacklisted IP
-    addresses, preventing DNS rebinding attacks on URL preview.
+    A proxy for reactor.nameResolver which only produces non-blocklisted IP
+    addresses, preventing DNS rebinding attacks.
     """
 
     def __init__(
         self,
         reactor: IReactorPluggableNameResolver,
-        ip_whitelist: Optional[IPSet],
-        ip_blacklist: IPSet,
+        ip_allowlist: Optional[IPSet],
+        ip_blocklist: IPSet,
     ):
         """
         Args:
             reactor: The twisted reactor.
-            ip_whitelist: IP addresses to allow.
-            ip_blacklist: IP addresses to disallow.
+            ip_allowlist: IP addresses to allow.
+            ip_blocklist: IP addresses to disallow.
         """
         self._reactor = reactor
-        self._ip_whitelist = ip_whitelist
-        self._ip_blacklist = ip_blacklist
+        self._ip_allowlist = ip_allowlist
+        self._ip_blocklist = ip_blocklist
 
     def resolveHostName(
         self, recv: IResolutionReceiver, hostname: str, portNumber: int = 0
@@ -191,16 +191,13 @@ class _IPBlacklistingResolver:
 
                 ip_address = IPAddress(address.host)
 
-                if check_against_blacklist(
-                    ip_address, self._ip_whitelist, self._ip_blacklist
-                ):
+                if _is_ip_blocked(ip_address, self._ip_allowlist, self._ip_blocklist):
                     logger.info(
-                        "Dropped %s from DNS resolution to %s due to blacklist"
-                        % (ip_address, hostname)
+                        "Blocked %s from DNS resolution to %s" % (ip_address, hostname)
                     )
                     has_bad_ip = True
 
-            # if we have a blacklisted IP, we'd like to raise an error to block the
+            # if we have a blocked IP, we'd like to raise an error to block the
             # request, but all we can really do from here is claim that there were no
             # valid results.
             if not has_bad_ip:
@@ -232,24 +229,24 @@ class _IPBlacklistingResolver:
 # ISynapseReactor implies IReactorCore, but explicitly marking it this as an implementer
 # of IReactorCore seems to keep mypy-zope happier.
 @implementer(IReactorCore, ISynapseReactor)
-class BlacklistingReactorWrapper:
+class BlocklistingReactorWrapper:
     """
-    A Reactor wrapper which will prevent DNS resolution to blacklisted IP
+    A Reactor wrapper which will prevent DNS resolution to blocked IP
     addresses, to prevent DNS rebinding.
     """
 
     def __init__(
         self,
         reactor: IReactorPluggableNameResolver,
-        ip_whitelist: Optional[IPSet],
-        ip_blacklist: IPSet,
+        ip_allowlist: Optional[IPSet],
+        ip_blocklist: IPSet,
     ):
         self._reactor = reactor
 
-        # We need to use a DNS resolver which filters out blacklisted IP
+        # We need to use a DNS resolver which filters out blocked IP
         # addresses, to prevent DNS rebinding.
-        self._nameResolver = _IPBlacklistingResolver(
-            self._reactor, ip_whitelist, ip_blacklist
+        self._nameResolver = _IPBlockingResolver(
+            self._reactor, ip_allowlist, ip_blocklist
         )
 
     def __getattr__(self, attr: str) -> Any:
@@ -260,7 +257,7 @@ class BlacklistingReactorWrapper:
             return getattr(self._reactor, attr)
 
 
-class BlacklistingAgentWrapper(Agent):
+class BlocklistingAgentWrapper(Agent):
     """
     An Agent wrapper which will prevent access to IP addresses being accessed
     directly (without an IP address lookup).
@@ -269,18 +266,18 @@ class BlacklistingAgentWrapper(Agent):
     def __init__(
         self,
         agent: IAgent,
-        ip_blacklist: IPSet,
-        ip_whitelist: Optional[IPSet] = None,
+        ip_blocklist: IPSet,
+        ip_allowlist: Optional[IPSet] = None,
     ):
         """
         Args:
             agent: The Agent to wrap.
-            ip_whitelist: IP addresses to allow.
-            ip_blacklist: IP addresses to disallow.
+            ip_allowlist: IP addresses to allow.
+            ip_blocklist: IP addresses to disallow.
         """
         self._agent = agent
-        self._ip_whitelist = ip_whitelist
-        self._ip_blacklist = ip_blacklist
+        self._ip_allowlist = ip_allowlist
+        self._ip_blocklist = ip_blocklist
 
     def request(
         self,
@@ -299,13 +296,9 @@ class BlacklistingAgentWrapper(Agent):
             # Not an IP
             pass
         else:
-            if check_against_blacklist(
-                ip_address, self._ip_whitelist, self._ip_blacklist
-            ):
-                logger.info("Blocking access to %s due to blacklist" % (ip_address,))
-                e = SynapseError(
-                    HTTPStatus.FORBIDDEN, "IP address blocked by IP blacklist entry"
-                )
+            if _is_ip_blocked(ip_address, self._ip_allowlist, self._ip_blocklist):
+                logger.info("Blocking access to %s" % (ip_address,))
+                e = SynapseError(HTTPStatus.FORBIDDEN, "IP address blocked")
                 return defer.fail(Failure(e))
 
         return self._agent.request(
@@ -763,10 +756,9 @@ class SimpleHttpClient(BaseHttpClient):
     Args:
         hs: The HomeServer instance to pass in
         treq_args: Extra keyword arguments to be given to treq.request.
-        ip_blacklist: The IP addresses that are blacklisted that
-            we may not request.
-        ip_whitelist: The whitelisted IP addresses, that we can
-           request if it were otherwise caught in a blacklist.
+        ip_blocklist: The IP addresses that we may not request.
+        ip_allowlist: The allowed IP addresses, that we can
+           request if it were otherwise caught in a blocklist.
         use_proxy: Whether proxy settings should be discovered and used
             from conventional environment variables.
     """
@@ -775,19 +767,19 @@ class SimpleHttpClient(BaseHttpClient):
         self,
         hs: "HomeServer",
         treq_args: Optional[Dict[str, Any]] = None,
-        ip_whitelist: Optional[IPSet] = None,
-        ip_blacklist: Optional[IPSet] = None,
+        ip_allowlist: Optional[IPSet] = None,
+        ip_blocklist: Optional[IPSet] = None,
         use_proxy: bool = False,
     ):
         super().__init__(hs, treq_args=treq_args)
-        self._ip_whitelist = ip_whitelist
-        self._ip_blacklist = ip_blacklist
-
-        if self._ip_blacklist:
-            # If we have an IP blacklist, we need to use a DNS resolver which
-            # filters out blacklisted IP addresses, to prevent DNS rebinding.
-            self.reactor: ISynapseReactor = BlacklistingReactorWrapper(
-                self.reactor, self._ip_whitelist, self._ip_blacklist
+        self._ip_allowlist = ip_allowlist
+        self._ip_blocklist = ip_blocklist
+
+        if self._ip_blocklist:
+            # If we have an IP blocklist, we need to use a DNS resolver which
+            # filters out blocked IP addresses, to prevent DNS rebinding.
+            self.reactor: ISynapseReactor = BlocklistingReactorWrapper(
+                self.reactor, self._ip_allowlist, self._ip_blocklist
             )
 
         # the pusher makes lots of concurrent SSL connections to Sygnal, and tends to
@@ -809,14 +801,13 @@ class SimpleHttpClient(BaseHttpClient):
             use_proxy=use_proxy,
         )
 
-        if self._ip_blacklist:
-            # If we have an IP blacklist, we then install the blacklisting Agent
-            # which prevents direct access to IP addresses, that are not caught
-            # by the DNS resolution.
-            self.agent = BlacklistingAgentWrapper(
+        if self._ip_blocklist:
+            # If we have an IP blocklist, we then install the Agent which prevents
+            # direct access to IP addresses, that are not caught by the DNS resolution.
+            self.agent = BlocklistingAgentWrapper(
                 self.agent,
-                ip_blacklist=self._ip_blacklist,
-                ip_whitelist=self._ip_whitelist,
+                ip_blocklist=self._ip_blocklist,
+                ip_allowlist=self._ip_allowlist,
             )
 
 
diff --git a/synapse/http/federation/matrix_federation_agent.py b/synapse/http/federation/matrix_federation_agent.py
index 8d7d0a3875..7e8cf31682 100644
--- a/synapse/http/federation/matrix_federation_agent.py
+++ b/synapse/http/federation/matrix_federation_agent.py
@@ -36,7 +36,7 @@ from twisted.web.iweb import IAgent, IAgentEndpointFactory, IBodyProducer, IResp
 
 from synapse.crypto.context_factory import FederationPolicyForHTTPS
 from synapse.http import proxyagent
-from synapse.http.client import BlacklistingAgentWrapper, BlacklistingReactorWrapper
+from synapse.http.client import BlocklistingAgentWrapper, BlocklistingReactorWrapper
 from synapse.http.connectproxyclient import HTTPConnectProxyEndpoint
 from synapse.http.federation.srv_resolver import Server, SrvResolver
 from synapse.http.federation.well_known_resolver import WellKnownResolver
@@ -65,12 +65,12 @@ class MatrixFederationAgent:
         user_agent:
             The user agent header to use for federation requests.
 
-        ip_whitelist: Allowed IP addresses.
+        ip_allowlist: Allowed IP addresses.
 
-        ip_blacklist: Disallowed IP addresses.
+        ip_blocklist: Disallowed IP addresses.
 
         proxy_reactor: twisted reactor to use for connections to the proxy server
-           reactor might have some blacklisting applied (i.e. for DNS queries),
+           reactor might have some blocking applied (i.e. for DNS queries),
            but we need unblocked access to the proxy.
 
         _srv_resolver:
@@ -87,17 +87,17 @@ class MatrixFederationAgent:
         reactor: ISynapseReactor,
         tls_client_options_factory: Optional[FederationPolicyForHTTPS],
         user_agent: bytes,
-        ip_whitelist: Optional[IPSet],
-        ip_blacklist: IPSet,
+        ip_allowlist: Optional[IPSet],
+        ip_blocklist: IPSet,
         _srv_resolver: Optional[SrvResolver] = None,
         _well_known_resolver: Optional[WellKnownResolver] = None,
     ):
-        # proxy_reactor is not blacklisted
+        # proxy_reactor is not blocklisting reactor
         proxy_reactor = reactor
 
-        # We need to use a DNS resolver which filters out blacklisted IP
+        # We need to use a DNS resolver which filters out blocked IP
         # addresses, to prevent DNS rebinding.
-        reactor = BlacklistingReactorWrapper(reactor, ip_whitelist, ip_blacklist)
+        reactor = BlocklistingReactorWrapper(reactor, ip_allowlist, ip_blocklist)
 
         self._clock = Clock(reactor)
         self._pool = HTTPConnectionPool(reactor)
@@ -120,7 +120,7 @@ class MatrixFederationAgent:
         if _well_known_resolver is None:
             _well_known_resolver = WellKnownResolver(
                 reactor,
-                agent=BlacklistingAgentWrapper(
+                agent=BlocklistingAgentWrapper(
                     ProxyAgent(
                         reactor,
                         proxy_reactor,
@@ -128,7 +128,7 @@ class MatrixFederationAgent:
                         contextFactory=tls_client_options_factory,
                         use_proxy=True,
                     ),
-                    ip_blacklist=ip_blacklist,
+                    ip_blocklist=ip_blocklist,
                 ),
                 user_agent=self.user_agent,
             )
@@ -256,7 +256,7 @@ class MatrixHostnameEndpoint:
     Args:
         reactor: twisted reactor to use for underlying requests
         proxy_reactor: twisted reactor to use for connections to the proxy server.
-           'reactor' might have some blacklisting applied (i.e. for DNS queries),
+           'reactor' might have some blocking applied (i.e. for DNS queries),
            but we need unblocked access to the proxy.
         tls_client_options_factory:
             factory to use for fetching client tls options, or none to disable TLS.
diff --git a/synapse/http/matrixfederationclient.py b/synapse/http/matrixfederationclient.py
index 634882487c..9094dab0fe 100644
--- a/synapse/http/matrixfederationclient.py
+++ b/synapse/http/matrixfederationclient.py
@@ -64,7 +64,7 @@ from synapse.api.errors import (
 from synapse.crypto.context_factory import FederationPolicyForHTTPS
 from synapse.http import QuieterFileBodyProducer
 from synapse.http.client import (
-    BlacklistingAgentWrapper,
+    BlocklistingAgentWrapper,
     BodyExceededMaxSize,
     ByteWriteable,
     _make_scheduler,
@@ -392,15 +392,15 @@ class MatrixFederationHttpClient:
             self.reactor,
             tls_client_options_factory,
             user_agent.encode("ascii"),
-            hs.config.server.federation_ip_range_whitelist,
-            hs.config.server.federation_ip_range_blacklist,
+            hs.config.server.federation_ip_range_allowlist,
+            hs.config.server.federation_ip_range_blocklist,
         )
 
-        # Use a BlacklistingAgentWrapper to prevent circumventing the IP
-        # blacklist via IP literals in server names
-        self.agent = BlacklistingAgentWrapper(
+        # Use a BlocklistingAgentWrapper to prevent circumventing the IP
+        # blocking via IP literals in server names
+        self.agent = BlocklistingAgentWrapper(
             federation_agent,
-            ip_blacklist=hs.config.server.federation_ip_range_blacklist,
+            ip_blocklist=hs.config.server.federation_ip_range_blocklist,
         )
 
         self.clock = hs.get_clock()
diff --git a/synapse/http/proxyagent.py b/synapse/http/proxyagent.py
index 94ef737b9e..7bdc4acae7 100644
--- a/synapse/http/proxyagent.py
+++ b/synapse/http/proxyagent.py
@@ -53,7 +53,7 @@ class ProxyAgent(_AgentBase):
             connections.
 
         proxy_reactor: twisted reactor to use for connections to the proxy server
-                       reactor might have some blacklisting applied (i.e. for DNS queries),
+                       reactor might have some blocking applied (i.e. for DNS queries),
                        but we need unblocked access to the proxy.
 
         contextFactory: A factory for TLS contexts, to control the
diff --git a/synapse/media/url_previewer.py b/synapse/media/url_previewer.py
index dbdb1fd20e..70b32cee17 100644
--- a/synapse/media/url_previewer.py
+++ b/synapse/media/url_previewer.py
@@ -105,7 +105,7 @@ class UrlPreviewer:
 
     When Synapse is asked to preview a URL it does the following:
 
-    1. Checks against a URL blacklist (defined as `url_preview_url_blacklist` in the
+    1. Checks against a URL blocklist (defined as `url_preview_url_blacklist` in the
        config).
     2. Checks the URL against an in-memory cache and returns the result if it exists. (This
        is also used to de-duplicate processing of multiple in-flight requests at once.)
@@ -167,8 +167,8 @@ class UrlPreviewer:
         self.client = SimpleHttpClient(
             hs,
             treq_args={"browser_like_redirects": True},
-            ip_whitelist=hs.config.media.url_preview_ip_range_whitelist,
-            ip_blacklist=hs.config.media.url_preview_ip_range_blacklist,
+            ip_allowlist=hs.config.media.url_preview_ip_range_allowlist,
+            ip_blocklist=hs.config.media.url_preview_ip_range_blocklist,
             use_proxy=True,
         )
         self.media_repo = media_repo
@@ -186,7 +186,7 @@ class UrlPreviewer:
             or instance_running_jobs == hs.get_instance_name()
         )
 
-        self.url_preview_url_blacklist = hs.config.media.url_preview_url_blacklist
+        self.url_preview_url_blocklist = hs.config.media.url_preview_url_blocklist
         self.url_preview_accept_language = hs.config.media.url_preview_accept_language
 
         # memory cache mapping urls to an ObservableDeferred returning
@@ -391,7 +391,7 @@ class UrlPreviewer:
             True if the URL is blocked, False if it is allowed.
         """
         url_tuple = urlsplit(url)
-        for entry in self.url_preview_url_blacklist:
+        for entry in self.url_preview_url_blocklist:
             match = True
             # Iterate over each entry. If *all* attributes of that entry match
             # the current URL, then reject it.
@@ -426,7 +426,7 @@ class UrlPreviewer:
 
             # All fields matched, return true (the URL is blocked).
             if match:
-                logger.warning("URL %s blocked by url_blacklist entry %s", url, entry)
+                logger.warning("URL %s blocked by entry %s", url, entry)
                 return match
 
         # No matches were found, the URL is allowed.
@@ -472,7 +472,7 @@ class UrlPreviewer:
         except DNSLookupError:
             # DNS lookup returned no results
             # Note: This will also be the case if one of the resolved IP
-            # addresses is blacklisted
+            # addresses is blocked.
             raise SynapseError(
                 502,
                 "DNS resolution failure during URL preview generation",
@@ -575,7 +575,7 @@ class UrlPreviewer:
 
         if self._is_url_blocked(url):
             raise SynapseError(
-                403, "URL blocked by url pattern blacklist entry", Codes.UNKNOWN
+                403, "URL blocked by url pattern blocklist entry", Codes.UNKNOWN
             )
 
         # TODO: we should probably honour robots.txt... except in practice
diff --git a/synapse/push/httppusher.py b/synapse/push/httppusher.py
index e91ee05e99..50027680cb 100644
--- a/synapse/push/httppusher.py
+++ b/synapse/push/httppusher.py
@@ -143,7 +143,7 @@ class HttpPusher(Pusher):
             )
 
         self.url = url
-        self.http_client = hs.get_proxied_blacklisted_http_client()
+        self.http_client = hs.get_proxied_blocklisted_http_client()
         self.data_minus_url = {}
         self.data_minus_url.update(self.data)
         del self.data_minus_url["url"]
diff --git a/synapse/server.py b/synapse/server.py
index aa90465047..f6e245569c 100644
--- a/synapse/server.py
+++ b/synapse/server.py
@@ -454,15 +454,15 @@ class HomeServer(metaclass=abc.ABCMeta):
         return SimpleHttpClient(self, use_proxy=True)
 
     @cache_in_self
-    def get_proxied_blacklisted_http_client(self) -> SimpleHttpClient:
+    def get_proxied_blocklisted_http_client(self) -> SimpleHttpClient:
         """
-        An HTTP client that uses configured HTTP(S) proxies and blacklists IPs
-        based on the IP range blacklist/whitelist.
+        An HTTP client that uses configured HTTP(S) proxies and blocks IPs
+        based on the configured IP ranges.
         """
         return SimpleHttpClient(
             self,
-            ip_whitelist=self.config.server.ip_range_whitelist,
-            ip_blacklist=self.config.server.ip_range_blacklist,
+            ip_allowlist=self.config.server.ip_range_allowlist,
+            ip_blocklist=self.config.server.ip_range_blocklist,
             use_proxy=True,
         )
 
diff --git a/synapse/storage/database.py b/synapse/storage/database.py
index 313cf1a8d0..bdaa508dbe 100644
--- a/synapse/storage/database.py
+++ b/synapse/storage/database.py
@@ -565,9 +565,8 @@ class DatabasePool:
         # A set of tables that are not safe to use native upserts in.
         self._unsafe_to_upsert_tables = set(UNIQUE_INDEX_BACKGROUND_UPDATES.keys())
 
-        # We add the user_directory_search table to the blacklist on SQLite
-        # because the existing search table does not have an index, making it
-        # unsafe to use native upserts.
+        # The user_directory_search table is unsafe to use native upserts
+        # on SQLite because the existing search table does not have an index.
         if isinstance(self.engine, Sqlite3Engine):
             self._unsafe_to_upsert_tables.add("user_directory_search")
 
diff --git a/tests/federation/test_federation_server.py b/tests/federation/test_federation_server.py
index 6c7738d810..5c850d1843 100644
--- a/tests/federation/test_federation_server.py
+++ b/tests/federation/test_federation_server.py
@@ -63,7 +63,7 @@ class FederationServerTests(unittest.FederatingHomeserverTestCase):
 
 
 class ServerACLsTestCase(unittest.TestCase):
-    def test_blacklisted_server(self) -> None:
+    def test_blocked_server(self) -> None:
         e = _create_acl_event({"allow": ["*"], "deny": ["evil.com"]})
         logging.info("ACL event: %s", e.content)
 
diff --git a/tests/handlers/test_sso.py b/tests/handlers/test_sso.py
index 620ae3a4ba..b9ffdb4ced 100644
--- a/tests/handlers/test_sso.py
+++ b/tests/handlers/test_sso.py
@@ -31,7 +31,7 @@ class TestSSOHandler(unittest.HomeserverTestCase):
         self.http_client.get_file.side_effect = mock_get_file
         self.http_client.user_agent = b"Synapse Test"
         hs = self.setup_test_homeserver(
-            proxied_blacklisted_http_client=self.http_client
+            proxied_blocklisted_http_client=self.http_client
         )
         return hs
 
diff --git a/tests/http/federation/test_matrix_federation_agent.py b/tests/http/federation/test_matrix_federation_agent.py
index eb7f53fee5..105b4caefa 100644
--- a/tests/http/federation/test_matrix_federation_agent.py
+++ b/tests/http/federation/test_matrix_federation_agent.py
@@ -269,8 +269,8 @@ class MatrixFederationAgentTests(unittest.TestCase):
             reactor=cast(ISynapseReactor, self.reactor),
             tls_client_options_factory=self.tls_factory,
             user_agent=b"test-agent",  # Note that this is unused since _well_known_resolver is provided.
-            ip_whitelist=IPSet(),
-            ip_blacklist=IPSet(),
+            ip_allowlist=IPSet(),
+            ip_blocklist=IPSet(),
             _srv_resolver=self.mock_resolver,
             _well_known_resolver=self.well_known_resolver,
         )
@@ -997,8 +997,8 @@ class MatrixFederationAgentTests(unittest.TestCase):
             reactor=self.reactor,
             tls_client_options_factory=tls_factory,
             user_agent=b"test-agent",  # This is unused since _well_known_resolver is passed below.
-            ip_whitelist=IPSet(),
-            ip_blacklist=IPSet(),
+            ip_allowlist=IPSet(),
+            ip_blocklist=IPSet(),
             _srv_resolver=self.mock_resolver,
             _well_known_resolver=WellKnownResolver(
                 cast(ISynapseReactor, self.reactor),
diff --git a/tests/http/test_client.py b/tests/http/test_client.py
index 57b6a84e23..a05b9f17a6 100644
--- a/tests/http/test_client.py
+++ b/tests/http/test_client.py
@@ -27,8 +27,8 @@ from twisted.web.iweb import UNKNOWN_LENGTH
 
 from synapse.api.errors import SynapseError
 from synapse.http.client import (
-    BlacklistingAgentWrapper,
-    BlacklistingReactorWrapper,
+    BlocklistingAgentWrapper,
+    BlocklistingReactorWrapper,
     BodyExceededMaxSize,
     _DiscardBodyWithMaxSizeProtocol,
     read_body_with_max_size,
@@ -140,7 +140,7 @@ class ReadBodyWithMaxSizeTests(TestCase):
         self.assertEqual(result.getvalue(), b"")
 
 
-class BlacklistingAgentTest(TestCase):
+class BlocklistingAgentTest(TestCase):
     def setUp(self) -> None:
         self.reactor, self.clock = get_clock()
 
@@ -157,16 +157,16 @@ class BlacklistingAgentTest(TestCase):
             self.reactor.lookups[domain.decode()] = ip.decode()
             self.reactor.lookups[ip.decode()] = ip.decode()
 
-        self.ip_whitelist = IPSet([self.allowed_ip.decode()])
-        self.ip_blacklist = IPSet(["5.0.0.0/8"])
+        self.ip_allowlist = IPSet([self.allowed_ip.decode()])
+        self.ip_blocklist = IPSet(["5.0.0.0/8"])
 
     def test_reactor(self) -> None:
-        """Apply the blacklisting reactor and ensure it properly blocks connections to particular domains and IPs."""
+        """Apply the blocklisting reactor and ensure it properly blocks connections to particular domains and IPs."""
         agent = Agent(
-            BlacklistingReactorWrapper(
+            BlocklistingReactorWrapper(
                 self.reactor,
-                ip_whitelist=self.ip_whitelist,
-                ip_blacklist=self.ip_blacklist,
+                ip_allowlist=self.ip_allowlist,
+                ip_blocklist=self.ip_blocklist,
             ),
         )
 
@@ -207,11 +207,11 @@ class BlacklistingAgentTest(TestCase):
             self.assertEqual(response.code, 200)
 
     def test_agent(self) -> None:
-        """Apply the blacklisting agent and ensure it properly blocks connections to particular IPs."""
-        agent = BlacklistingAgentWrapper(
+        """Apply the blocklisting agent and ensure it properly blocks connections to particular IPs."""
+        agent = BlocklistingAgentWrapper(
             Agent(self.reactor),
-            ip_blacklist=self.ip_blacklist,
-            ip_whitelist=self.ip_whitelist,
+            ip_blocklist=self.ip_blocklist,
+            ip_allowlist=self.ip_allowlist,
         )
 
         # The unsafe IPs should be rejected.
diff --git a/tests/http/test_matrixfederationclient.py b/tests/http/test_matrixfederationclient.py
index d89a91c59d..0dfc03ce50 100644
--- a/tests/http/test_matrixfederationclient.py
+++ b/tests/http/test_matrixfederationclient.py
@@ -231,11 +231,11 @@ class FederationClientTests(HomeserverTestCase):
         self.assertIsInstance(f.value, RequestSendFailed)
         self.assertIsInstance(f.value.inner_exception, ResponseNeverReceived)
 
-    def test_client_ip_range_blacklist(self) -> None:
-        """Ensure that Synapse does not try to connect to blacklisted IPs"""
+    def test_client_ip_range_blocklist(self) -> None:
+        """Ensure that Synapse does not try to connect to blocked IPs"""
 
-        # Set up the ip_range blacklist
-        self.hs.config.server.federation_ip_range_blacklist = IPSet(
+        # Set up the ip_range blocklist
+        self.hs.config.server.federation_ip_range_blocklist = IPSet(
             ["127.0.0.0/8", "fe80::/64"]
         )
         self.reactor.lookups["internal"] = "127.0.0.1"
@@ -243,7 +243,7 @@ class FederationClientTests(HomeserverTestCase):
         self.reactor.lookups["fine"] = "10.20.30.40"
         cl = MatrixFederationHttpClient(self.hs, None)
 
-        # Try making a GET request to a blacklisted IPv4 address
+        # Try making a GET request to a blocked IPv4 address
         # ------------------------------------------------------
         # Make the request
         d = defer.ensureDeferred(cl.get_json("internal:8008", "foo/bar", timeout=10000))
@@ -261,7 +261,7 @@ class FederationClientTests(HomeserverTestCase):
         self.assertIsInstance(f.value, RequestSendFailed)
         self.assertIsInstance(f.value.inner_exception, DNSLookupError)
 
-        # Try making a POST request to a blacklisted IPv6 address
+        # Try making a POST request to a blocked IPv6 address
         # -------------------------------------------------------
         # Make the request
         d = defer.ensureDeferred(
@@ -278,11 +278,11 @@ class FederationClientTests(HomeserverTestCase):
         clients = self.reactor.tcpClients
         self.assertEqual(len(clients), 0)
 
-        # Check that it was due to a blacklisted DNS lookup
+        # Check that it was due to a blocked DNS lookup
         f = self.failureResultOf(d, RequestSendFailed)
         self.assertIsInstance(f.value.inner_exception, DNSLookupError)
 
-        # Try making a GET request to a non-blacklisted IPv4 address
+        # Try making a GET request to an allowed IPv4 address
         # ----------------------------------------------------------
         # Make the request
         d = defer.ensureDeferred(cl.post_json("fine:8008", "foo/bar", timeout=10000))
diff --git a/tests/http/test_proxyagent.py b/tests/http/test_proxyagent.py
index cc175052ac..e0ae5a88ff 100644
--- a/tests/http/test_proxyagent.py
+++ b/tests/http/test_proxyagent.py
@@ -32,7 +32,7 @@ from twisted.internet.protocol import Factory, Protocol
 from twisted.protocols.tls import TLSMemoryBIOFactory, TLSMemoryBIOProtocol
 from twisted.web.http import HTTPChannel
 
-from synapse.http.client import BlacklistingReactorWrapper
+from synapse.http.client import BlocklistingReactorWrapper
 from synapse.http.connectproxyclient import ProxyCredentials
 from synapse.http.proxyagent import ProxyAgent, parse_proxy
 
@@ -684,11 +684,11 @@ class MatrixFederationAgentTests(TestCase):
         self.assertEqual(body, b"result")
 
     @patch.dict(os.environ, {"http_proxy": "proxy.com:8888"})
-    def test_http_request_via_proxy_with_blacklist(self) -> None:
-        # The blacklist includes the configured proxy IP.
+    def test_http_request_via_proxy_with_blocklist(self) -> None:
+        # The blocklist includes the configured proxy IP.
         agent = ProxyAgent(
-            BlacklistingReactorWrapper(
-                self.reactor, ip_whitelist=None, ip_blacklist=IPSet(["1.0.0.0/8"])
+            BlocklistingReactorWrapper(
+                self.reactor, ip_allowlist=None, ip_blocklist=IPSet(["1.0.0.0/8"])
             ),
             self.reactor,
             use_proxy=True,
@@ -730,11 +730,11 @@ class MatrixFederationAgentTests(TestCase):
         self.assertEqual(body, b"result")
 
     @patch.dict(os.environ, {"HTTPS_PROXY": "proxy.com"})
-    def test_https_request_via_uppercase_proxy_with_blacklist(self) -> None:
-        # The blacklist includes the configured proxy IP.
+    def test_https_request_via_uppercase_proxy_with_blocklist(self) -> None:
+        # The blocklist includes the configured proxy IP.
         agent = ProxyAgent(
-            BlacklistingReactorWrapper(
-                self.reactor, ip_whitelist=None, ip_blacklist=IPSet(["1.0.0.0/8"])
+            BlocklistingReactorWrapper(
+                self.reactor, ip_allowlist=None, ip_blocklist=IPSet(["1.0.0.0/8"])
             ),
             self.reactor,
             contextFactory=get_test_https_policy(),
diff --git a/tests/http/test_simple_client.py b/tests/http/test_simple_client.py
index 010601da4b..be731645bf 100644
--- a/tests/http/test_simple_client.py
+++ b/tests/http/test_simple_client.py
@@ -123,17 +123,17 @@ class SimpleHttpClientTests(HomeserverTestCase):
 
         self.assertIsInstance(f.value, RequestTimedOutError)
 
-    def test_client_ip_range_blacklist(self) -> None:
-        """Ensure that Synapse does not try to connect to blacklisted IPs"""
+    def test_client_ip_range_blocklist(self) -> None:
+        """Ensure that Synapse does not try to connect to blocked IPs"""
 
-        # Add some DNS entries we'll blacklist
+        # Add some DNS entries we'll block
         self.reactor.lookups["internal"] = "127.0.0.1"
         self.reactor.lookups["internalv6"] = "fe80:0:0:0:0:8a2e:370:7337"
-        ip_blacklist = IPSet(["127.0.0.0/8", "fe80::/64"])
+        ip_blocklist = IPSet(["127.0.0.0/8", "fe80::/64"])
 
-        cl = SimpleHttpClient(self.hs, ip_blacklist=ip_blacklist)
+        cl = SimpleHttpClient(self.hs, ip_blocklist=ip_blocklist)
 
-        # Try making a GET request to a blacklisted IPv4 address
+        # Try making a GET request to a blocked IPv4 address
         # ------------------------------------------------------
         # Make the request
         d = defer.ensureDeferred(cl.get_json("http://internal:8008/foo/bar"))
@@ -145,7 +145,7 @@ class SimpleHttpClientTests(HomeserverTestCase):
 
         self.failureResultOf(d, DNSLookupError)
 
-        # Try making a POST request to a blacklisted IPv6 address
+        # Try making a POST request to a blocked IPv6 address
         # -------------------------------------------------------
         # Make the request
         d = defer.ensureDeferred(
@@ -159,10 +159,10 @@ class SimpleHttpClientTests(HomeserverTestCase):
         clients = self.reactor.tcpClients
         self.assertEqual(len(clients), 0)
 
-        # Check that it was due to a blacklisted DNS lookup
+        # Check that it was due to a blocked DNS lookup
         self.failureResultOf(d, DNSLookupError)
 
-        # Try making a GET request to a non-blacklisted IPv4 address
+        # Try making a GET request to a non-blocked IPv4 address
         # ----------------------------------------------------------
         # Make the request
         d = defer.ensureDeferred(cl.get_json("http://testserv:8008/foo/bar"))
diff --git a/tests/push/test_http.py b/tests/push/test_http.py
index 54f558742d..e68a979ee0 100644
--- a/tests/push/test_http.py
+++ b/tests/push/test_http.py
@@ -52,7 +52,7 @@ class HTTPPusherTests(HomeserverTestCase):
 
         m.post_json_get_json = post_json_get_json
 
-        hs = self.setup_test_homeserver(proxied_blacklisted_http_client=m)
+        hs = self.setup_test_homeserver(proxied_blocklisted_http_client=m)
 
         return hs
 
diff --git a/tests/replication/test_pusher_shard.py b/tests/replication/test_pusher_shard.py
index dcb3e6669b..875811669c 100644
--- a/tests/replication/test_pusher_shard.py
+++ b/tests/replication/test_pusher_shard.py
@@ -93,7 +93,7 @@ class PusherShardTestCase(BaseMultiWorkerStreamTestCase):
         self.make_worker_hs(
             "synapse.app.generic_worker",
             {"worker_name": "pusher1", "pusher_instances": ["pusher1"]},
-            proxied_blacklisted_http_client=http_client_mock,
+            proxied_blocklisted_http_client=http_client_mock,
         )
 
         event_id = self._create_pusher_and_send_msg("user")
@@ -126,7 +126,7 @@ class PusherShardTestCase(BaseMultiWorkerStreamTestCase):
                 "worker_name": "pusher1",
                 "pusher_instances": ["pusher1", "pusher2"],
             },
-            proxied_blacklisted_http_client=http_client_mock1,
+            proxied_blocklisted_http_client=http_client_mock1,
         )
 
         http_client_mock2 = Mock(spec_set=["post_json_get_json"])
@@ -140,7 +140,7 @@ class PusherShardTestCase(BaseMultiWorkerStreamTestCase):
                 "worker_name": "pusher2",
                 "pusher_instances": ["pusher1", "pusher2"],
             },
-            proxied_blacklisted_http_client=http_client_mock2,
+            proxied_blocklisted_http_client=http_client_mock2,
         )
 
         # We choose a user name that we know should go to pusher1.
diff --git a/tests/rest/media/test_url_preview.py b/tests/rest/media/test_url_preview.py
index 7517155cf3..170fb0534a 100644
--- a/tests/rest/media/test_url_preview.py
+++ b/tests/rest/media/test_url_preview.py
@@ -418,9 +418,9 @@ class URLPreviewTests(unittest.HomeserverTestCase):
             channel.json_body, {"og:title": "~matrix~", "og:description": "hi"}
         )
 
-    def test_blacklisted_ip_specific(self) -> None:
+    def test_blocked_ip_specific(self) -> None:
         """
-        Blacklisted IP addresses, found via DNS, are not spidered.
+        Blocked IP addresses, found via DNS, are not spidered.
         """
         self.lookups["example.com"] = [(IPv4Address, "192.168.1.1")]
 
@@ -439,9 +439,9 @@ class URLPreviewTests(unittest.HomeserverTestCase):
             },
         )
 
-    def test_blacklisted_ip_range(self) -> None:
+    def test_blocked_ip_range(self) -> None:
         """
-        Blacklisted IP ranges, IPs found over DNS, are not spidered.
+        Blocked IP ranges, IPs found over DNS, are not spidered.
         """
         self.lookups["example.com"] = [(IPv4Address, "1.1.1.2")]
 
@@ -458,9 +458,9 @@ class URLPreviewTests(unittest.HomeserverTestCase):
             },
         )
 
-    def test_blacklisted_ip_specific_direct(self) -> None:
+    def test_blocked_ip_specific_direct(self) -> None:
         """
-        Blacklisted IP addresses, accessed directly, are not spidered.
+        Blocked IP addresses, accessed directly, are not spidered.
         """
         channel = self.make_request(
             "GET", "preview_url?url=http://192.168.1.1", shorthand=False
@@ -470,16 +470,13 @@ class URLPreviewTests(unittest.HomeserverTestCase):
         self.assertEqual(len(self.reactor.tcpClients), 0)
         self.assertEqual(
             channel.json_body,
-            {
-                "errcode": "M_UNKNOWN",
-                "error": "IP address blocked by IP blacklist entry",
-            },
+            {"errcode": "M_UNKNOWN", "error": "IP address blocked"},
         )
         self.assertEqual(channel.code, 403)
 
-    def test_blacklisted_ip_range_direct(self) -> None:
+    def test_blocked_ip_range_direct(self) -> None:
         """
-        Blacklisted IP ranges, accessed directly, are not spidered.
+        Blocked IP ranges, accessed directly, are not spidered.
         """
         channel = self.make_request(
             "GET", "preview_url?url=http://1.1.1.2", shorthand=False
@@ -488,15 +485,12 @@ class URLPreviewTests(unittest.HomeserverTestCase):
         self.assertEqual(channel.code, 403)
         self.assertEqual(
             channel.json_body,
-            {
-                "errcode": "M_UNKNOWN",
-                "error": "IP address blocked by IP blacklist entry",
-            },
+            {"errcode": "M_UNKNOWN", "error": "IP address blocked"},
         )
 
-    def test_blacklisted_ip_range_whitelisted_ip(self) -> None:
+    def test_blocked_ip_range_whitelisted_ip(self) -> None:
         """
-        Blacklisted but then subsequently whitelisted IP addresses can be
+        Blocked but then subsequently whitelisted IP addresses can be
         spidered.
         """
         self.lookups["example.com"] = [(IPv4Address, "1.1.1.1")]
@@ -527,10 +521,10 @@ class URLPreviewTests(unittest.HomeserverTestCase):
             channel.json_body, {"og:title": "~matrix~", "og:description": "hi"}
         )
 
-    def test_blacklisted_ip_with_external_ip(self) -> None:
+    def test_blocked_ip_with_external_ip(self) -> None:
         """
-        If a hostname resolves a blacklisted IP, even if there's a
-        non-blacklisted one, it will be rejected.
+        If a hostname resolves a blocked IP, even if there's a non-blocked one,
+        it will be rejected.
         """
         # Hardcode the URL resolving to the IP we want.
         self.lookups["example.com"] = [
@@ -550,9 +544,9 @@ class URLPreviewTests(unittest.HomeserverTestCase):
             },
         )
 
-    def test_blacklisted_ipv6_specific(self) -> None:
+    def test_blocked_ipv6_specific(self) -> None:
         """
-        Blacklisted IP addresses, found via DNS, are not spidered.
+        Blocked IP addresses, found via DNS, are not spidered.
         """
         self.lookups["example.com"] = [
             (IPv6Address, "3fff:ffff:ffff:ffff:ffff:ffff:ffff:ffff")
@@ -573,9 +567,9 @@ class URLPreviewTests(unittest.HomeserverTestCase):
             },
         )
 
-    def test_blacklisted_ipv6_range(self) -> None:
+    def test_blocked_ipv6_range(self) -> None:
         """
-        Blacklisted IP ranges, IPs found over DNS, are not spidered.
+        Blocked IP ranges, IPs found over DNS, are not spidered.
         """
         self.lookups["example.com"] = [(IPv6Address, "2001:800::1")]
 
@@ -1359,7 +1353,7 @@ class URLPreviewTests(unittest.HomeserverTestCase):
 
     @unittest.override_config({"url_preview_url_blacklist": [{"port": "*"}]})
     def test_blocked_port(self) -> None:
-        """Tests that blacklisting URLs with a port makes previewing such URLs
+        """Tests that blocking URLs with a port makes previewing such URLs
         fail with a 403 error and doesn't impact other previews.
         """
         self.lookups["matrix.org"] = [(IPv4Address, "10.1.2.3")]
@@ -1401,7 +1395,7 @@ class URLPreviewTests(unittest.HomeserverTestCase):
         {"url_preview_url_blacklist": [{"netloc": "example.com"}]}
     )
     def test_blocked_url(self) -> None:
-        """Tests that blacklisting URLs with a host makes previewing such URLs
+        """Tests that blocking URLs with a host makes previewing such URLs
         fail with a 403 error.
         """
         self.lookups["example.com"] = [(IPv4Address, "10.1.2.3")]