Chatmail TURN server ports

amuuza · November 4, 2025, 9:33pm

Does the Chatmail TURN server require a range of UDP ports to be configured and open?

link2xt · November 4, 2025, 10:22pm

The default server by default allocates ports completely randomly, not from some range. If you don’t have any external firewall, this should just work, otherwise you need to allow incoming connections on all UDP ports.

bestman · November 5, 2025, 11:08pm

I’m sorry, but you can’t limit yourself to some range, for example ufw allow 49152: 65535 / udp, or open directly from 1-65535? Thanks

WofWca · November 6, 2025, 7:02am

Unless I’m misinterpreting it, I think it can be possible to control it here:

github.com/chatmail/chatmail-turn

src/main.rs

7f7cc0c0f


      
          relay_addr_generator: Box::new(RelayAddressGeneratorStatic {
              relay_address: public_ip,
              address: public_ip.to_string(),
              net: Arc::new(Net::new(None)),
          }),

with RelayAddressGeneratorRanges.

amuuza · November 9, 2025, 3:14pm

So, if I would like to restrict it to the range -for instance- UDP 60000-60299, what should I do?

link2xt · November 10, 2025, 5:15am

What is the reason for limiting the range of ports available to the TURN server?

amuza · November 10, 2025, 9:12am

You might be sharing Chatmail’s public IP address with other services that require UDP traffic.