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-rw-r--r--docs/sample_config.yaml66
1 files changed, 45 insertions, 21 deletions
diff --git a/docs/sample_config.yaml b/docs/sample_config.yaml
index 68c8f4f0e2..f196781c1c 100644
--- a/docs/sample_config.yaml
+++ b/docs/sample_config.yaml
@@ -144,6 +144,35 @@ pid_file: DATADIR/homeserver.pid
 #
 #enable_search: false
 
+# Prevent outgoing requests from being sent to the following blacklisted IP address
+# CIDR ranges. If this option is not specified then it defaults to private IP
+# address ranges (see the example below).
+#
+# The blacklist applies to the outbound requests for federation, identity servers,
+# push servers, and for checking key validity for third-party invite events.
+#
+# (0.0.0.0 and :: are always blacklisted, whether or not they are explicitly
+# listed here, since they correspond to unroutable addresses.)
+#
+# This option replaces federation_ip_range_blacklist in Synapse v1.25.0.
+#
+#ip_range_blacklist:
+#  - '127.0.0.0/8'
+#  - '10.0.0.0/8'
+#  - '172.16.0.0/12'
+#  - '192.168.0.0/16'
+#  - '100.64.0.0/10'
+#  - '192.0.0.0/24'
+#  - '169.254.0.0/16'
+#  - '198.18.0.0/15'
+#  - '192.0.2.0/24'
+#  - '198.51.100.0/24'
+#  - '203.0.113.0/24'
+#  - '224.0.0.0/4'
+#  - '::1/128'
+#  - 'fe80::/10'
+#  - 'fc00::/7'
+
 # List of ports that Synapse should listen on, their purpose and their
 # configuration.
 #
@@ -642,28 +671,17 @@ acme:
 #  - nyc.example.com
 #  - syd.example.com
 
-# Prevent outgoing requests from being sent to the following blacklisted IP address
-# CIDR ranges. If this option is not specified, or specified with an empty list,
-# no IP range blacklist will be enforced.
+# List of IP address CIDR ranges that should be allowed for federation,
+# identity servers, push servers, and for checking key validity for
+# third-party invite events. This is useful for specifying exceptions to
+# wide-ranging blacklisted target IP ranges - e.g. for communication with
+# a push server only visible in your network.
 #
-# The blacklist applies to the outbound requests for federation, identity servers,
-# push servers, and for checking key validitity for third-party invite events.
-#
-# (0.0.0.0 and :: are always blacklisted, whether or not they are explicitly
-# listed here, since they correspond to unroutable addresses.)
-#
-# This option replaces federation_ip_range_blacklist in Synapse v1.24.0.
+# This whitelist overrides ip_range_blacklist and defaults to an empty
+# list.
 #
-ip_range_blacklist:
-  - '127.0.0.0/8'
-  - '10.0.0.0/8'
-  - '172.16.0.0/12'
-  - '192.168.0.0/16'
-  - '100.64.0.0/10'
-  - '169.254.0.0/16'
-  - '::1/128'
-  - 'fe80::/64'
-  - 'fc00::/7'
+#ip_range_whitelist:
+#   - '192.168.1.1'
 
 # Report prometheus metrics on the age of PDUs being sent to and received from
 # the following domains. This can be used to give an idea of "delay" on inbound
@@ -955,9 +973,15 @@ media_store_path: "DATADIR/media_store"
 #  - '172.16.0.0/12'
 #  - '192.168.0.0/16'
 #  - '100.64.0.0/10'
+#  - '192.0.0.0/24'
 #  - '169.254.0.0/16'
+#  - '198.18.0.0/15'
+#  - '192.0.2.0/24'
+#  - '198.51.100.0/24'
+#  - '203.0.113.0/24'
+#  - '224.0.0.0/4'
 #  - '::1/128'
-#  - 'fe80::/64'
+#  - 'fe80::/10'
 #  - 'fc00::/7'
 
 # List of IP address CIDR ranges that the URL preview spider is allowed