diff --git a/README.rst b/README.rst
index 722ff9f11f..ebcb15a977 100644
--- a/README.rst
+++ b/README.rst
@@ -105,7 +105,7 @@ Installing prerequisites on Ubuntu or Debian::
sudo apt-get install build-essential python2.7-dev libffi-dev \
python-pip python-setuptools sqlite3 \
- libssl-dev python-virtualenv libjpeg-dev
+ libssl-dev python-virtualenv libjpeg-dev libxslt1-dev
Installing prerequisites on ArchLinux::
@@ -119,7 +119,6 @@ Installing prerequisites on CentOS 7::
python-virtualenv libffi-devel openssl-devel
sudo yum groupinstall "Development Tools"
-
Installing prerequisites on Mac OS X::
xcode-select --install
@@ -151,12 +150,7 @@ In case of problems, please see the _Troubleshooting section below.
Alternatively, Silvio Fricke has contributed a Dockerfile to automate the
above in Docker at https://registry.hub.docker.com/u/silviof/docker-matrix/.
-Another alternative is to install via apt from http://matrix.org/packages/debian/.
-Note that these packages do not include a client - choose one from
-https://matrix.org/blog/try-matrix-now/ (or build your own with
-https://github.com/matrix-org/matrix-js-sdk/).
-
-Finally, Martin Giess has created an auto-deployment process with vagrant/ansible,
+Also, Martin Giess has created an auto-deployment process with vagrant/ansible,
tested with VirtualBox/AWS/DigitalOcean - see https://github.com/EMnify/matrix-synapse-auto-deploy
for details.
@@ -230,6 +224,19 @@ For information on how to install and use PostgreSQL, please see
Platform Specific Instructions
==============================
+Debian
+------
+
+Matrix provides official Debian packages via apt from http://matrix.org/packages/debian/.
+Note that these packages do not include a client - choose one from
+https://matrix.org/blog/try-matrix-now/ (or build your own with one of our SDKs :)
+
+Fedora
+------
+
+Oleg Girko provides Fedora RPMs at
+https://obs.infoserver.lv/project/monitor/matrix-synapse
+
ArchLinux
---------
@@ -271,11 +278,17 @@ During setup of Synapse you need to call python2.7 directly again::
FreeBSD
-------
-Synapse can be installed via FreeBSD Ports or Packages:
+Synapse can be installed via FreeBSD Ports or Packages contributed by Brendan Molloy from:
- Ports: ``cd /usr/ports/net/py-matrix-synapse && make install clean``
- Packages: ``pkg install py27-matrix-synapse``
+NixOS
+-----
+
+Robin Lambertz has packaged Synapse for NixOS at:
+https://github.com/NixOS/nixpkgs/blob/master/nixos/modules/services/misc/matrix-synapse.nix
+
Windows Install
---------------
Synapse can be installed on Cygwin. It requires the following Cygwin packages:
@@ -545,6 +558,23 @@ as the primary means of identity and E2E encryption is not complete. As such,
we are running a single identity server (https://matrix.org) at the current
time.
+
+URL Previews
+============
+
+Synapse 0.15.0 introduces an experimental new API for previewing URLs at
+/_matrix/media/r0/preview_url. This is disabled by default. To turn it on
+you must enable the `url_preview_enabled: True` config parameter and explicitly
+specify the IP ranges that Synapse is not allowed to spider for previewing in
+the `url_preview_ip_range_blacklist` configuration parameter. This is critical
+from a security perspective to stop arbitrary Matrix users spidering 'internal'
+URLs on your network. At the very least we recommend that your loopback and
+RFC1918 IP addresses are blacklisted.
+
+This also requires the optional lxml and netaddr python dependencies to be
+installed.
+
+
Password reset
==============
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