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Update for changing the federation port

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This is a proposed add to the documentation to inform users how to change the federation port using the ansible playbook for eventual use with third party services such as CDNs.
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AnonyPla 2022-02-19 10:49:31 +00:00 committed by GitHub
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docs/configuring-playbook-federation.md
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@ -47,3 +47,20 @@ matrix_synapse_federation_port_enabled: false
# This removes the `8448` virtual host from the matrix-nginx-proxy reverse-proxy server.
matrix_nginx_proxy_proxy_matrix_federation_api_enabled: false
```
## Changing the federation port from 8448 to a different port to use a CDN that only accepts 443/80 ports
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.
The following changes in the configuration file (`inventory/host_vars/matrix.<your-domain>/vars.yml`) will allow this and make it possible to proxy the federation through a CDN such as CloudFlare or any other:
```
matrix_synapse_http_listener_resource_names: ["client","federation"]
# Any port can be used but in this case we use 443
matrix_federation_public_port: 443
matrix_synapse_federation_port_enabled: false
# Note tht the following change might not be "required per se" but probably will be due to the proxying of the traffic through the CDN proxy servers (CloudFlare for instance). The security impact of doing this should be minimal as your CDN itself will encrypt the traffic no matter what on their proxy servers. You could however first try and see if federation works while setting the following to true.
matrix_synapse_tls_federation_listener_enabled: false
```
**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.**