msgid "By default, your server federates with the whole Matrix network. That is, people on your server can communicate with people on any other Matrix server."
msgid "**Note**: in the sample `vars.yml` ([`examples/vars.yml`](../examples/vars.yml)), we recommend to use a short user ID like `@alice:example.com` instead of `@alice:matrix.example.com` and set up [server delegation](howto-server-delegation.md) / redirection. Without a proper configuration, your server will effectively not be part of the Matrix network. If you find your server is not federated, make sure to [check whether services work](maintenance-checking-services.md) and your server is properly delegated."
msgid "To make your server only federate with servers of your choosing, add the following configuration to your `inventory/host_vars/matrix.example.com/vars.yml` file (adapt to your needs):"
msgid "To completely disable federation, isolating your server from the rest of the Matrix network, add this to your configuration file (`inventory/host_vars/matrix.example.com/vars.yml`):"
msgid "**Disabling federation does not necessarily disable the federation port** (`8448`). Services like [Dimension](configuring-playbook-dimension.md) and [ma1sd](configuring-playbook-ma1sd.md) normally rely on `openid` APIs exposed on that port. Even if you disable federation and only if necessary, we may still be exposing the federation port and serving the `openid` APIs there. To override this and completely disable Synapse's federation port use:"
msgid "Why? This change could be useful for people running small Synapse instances on small severs/VPSes to avoid being impacted by a simple DOS/DDOS when bandwidth, RAM, an CPU resources are limited and if your hosting provider does not provide a DOS/DDOS protection."
msgid "The following changes in the configuration file (`inventory/host_vars/matrix.example.com/vars.yml`) will allow this and make it possible to proxy the federation through a CDN such as CloudFlare or any other:"
msgid "**Use this at you own risk as all the possible side-effects of doing this are not fully known. However, it has been tested and works fine and passes all the tests on <https://federationtester.matrix.org/> without issues.**"