[SR-Users] Kamailio and TLS-PSK Support

Dear Kamailio Community,

I am currently exploring the possibility of configuring Kamailio to use TLS-PSK (Pre-Shared Key) for secure SIP signaling.

Has anyone successfully configured Kamailio to work with TLS-PSK? If so, could you share any guidance, configuration examples, or relevant modules that need to be adjusted?

In this setup, the SIP client will be a device with very limited resources, making it impossible to use certificates. This is why I am specifically looking into a TLS-PSK solution.

I have also tried configuring stunnel as a proxy and set listen = tcp:127.0.0.1:5061 in kamailio config, but I haven't been able to get it working. Any suggestions on what might be missing or misconfigured?

Thank you in advance for your help!