Hi all! I finally got two clients (minisip and Snom softphone) to work with openser via TLS. I was using port 5060 for TLS connections, which is non-standard. I wanted to change this behavious and make openser listen for TLS connections on port 5061, which I thought should be possible with the following configuration parameter: listen = tls:10.1.2.9:5061 After configuring the client (minisip) to use port 5061 for TLS, restarting openser and re-registering the client, I get the following error messages in the openser log: Feb 23 16:48:45 server /usr/local/sbin/openser[6011]: ERROR:tm:add_uac: can't fwd to af 2, proto 1 (no corresponding listening socket) Feb 23 16:48:45 server /usr/local/sbin/openser[6011]: ERROR:tm:t_forward_nonack: failure to add branches The ssl handshake worked without problems, which I confirmed by looking at the output of ssldump. Can anyone tell me what these error messages mean? I am using openser-1.0.0-tls. Cheers, Martin