Bug#964009: coturn cannot bind TLS/TCP listener socket to addr

[Benoît Tonnerre]

Package: coturn
Version: 4.5.1.1-1.1+deb10u1

Since the last update (from 4.5.1.1-1.1 to 4.5.1.1-1.1+deb10u1) coturn
server does not work anymore.

The file /var/log/syslog contains :

Jun 29 18:25:08 rex turnserver: 0: Cannot bind TLS/TCP listener socket to
addr W.X.Y.Z:443
Jun 29 18:25:08 rex turnserver: 0: Trying to bind TLS/TCP listener socket
to addr W.X.Y.Z:443, again...

I found out an issue on GitHub for this :
https://github.com/coturn/coturn/issues/421

I modified the file /lib/systemd/system/coturn.service to include
AmbientCapabilities=CAP_NET_BIND_SERVICE to the [Service] section and the
coturn server is working again.

I hope It can help people.

Best regards

Benoît
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