If your server name is identical to the domain on which synapse is installed, and the default port 8448 is used, your server is normally already accessible by the federation.
If not, you can add the following line in the dns configuration but you normally don't need it as a .well-known file is edited during the install to declare your server name and port to the federation.
You need to replace SYNAPSE_PORT by the real port. This port can be obtained by the command: `yunohost app setting SYNAPSE_INSTANCE_NAME synapse_tls_port`
You also need a valid TLS certificate for the domain used by synapse. To do that you can refer to the documentation here : https://yunohost.org/#/certificate_en
For Voip and video conferencing a turnserver is also installed (and configured). The turnserver listens on two UDP and TCP ports. You can get them with these commands:
For some security reason the ports range (49153 - 49193) isn't automatically open by default. If you want to use the synapse server for voip or conferencing you will need to open this port range manually. To do this just run this command:
To prevent the situation when the server is behind a NAT, the public IP is written in the turnserver config. By this the turnserver can send its real public IP to the client. For more information see [the coturn example config file](https://github.com/coturn/coturn/blob/master/examples/etc/turnserver.conf#L102-L120).So if your IP changes, you could run the script `/opt/yunohost/__SYNAPSE_INSTANCE_NAME__/Coturn_config_rotate.sh` to update your config.
If you have a dynamic IP address, you also might need to update this config automatically. To do that just edit a file named `/etc/cron.d/coturn_config_rotate` and add the following content (just adapt the __SYNAPSE_INSTANCE_NAME__ which could be `synapse` or maybe `synapse__2`).
In case of you have an OpenVPN server you might want than `coturn-synapse` restart when the VPN restart. To do this create a file named `/usr/local/bin/openvpn_up_script.sh` with this content:
```
#!/bin/bash
(
sleep 5
sudo systemctl restart coturn-synapse.service
) &
exit 0
```
Add this line in you sudo config file `/etc/sudoers`
This app doesn't provide any real good web interface. So it's recommended to use Element client to connect to this app. This app is available [here](https://github.com/YunoHost-Apps/element_ynh)
To give a possibility to have multiple domains you can use multiple instances of synapse. In this case all instances will run on different ports so it's really important to put a SRV record in your domain. You can get the port that you need to put in your SRV record with this following command:
