Hello Kamailio Community,

I’ve been troubleshooting an issue with Kamailio where the TLS listener fails to bind to any specified ports (5061, 10061, etc.), despite valid configurations and certificates. Here’s a summary of my setup and steps taken:

1. Environment Details:

   • Kamailio version: 5.7.4

   • OpenSSL version: 3.0.13

   • Operating System: Ubuntu (Noble Release)

   • TLS module (tls.so) is installed and loaded.

2. Issue Details:

   • Configurations validate successfully (config file ok).

   • OpenSSL works perfectly when testing certificates and keys with s_server, binding to ports (5061 and others).

   • Kamailio fails to bind TLS listeners (ss -tulnp shows no activity on the specified ports).

3. Steps Already Taken:

   • Simplified TLS configuration (minimal_tls.cfg) with:

     plaintext

     listen=tls:10.14.202.39:5061
     loadmodule "tls.so"
     modparam("tls", "certificate", "/home/localtech/vicissl/868a963bc33d5eae.crt")
     modparam("tls", "private_key", "/home/localtech/vicissl/private.key")
     

   • Tested multiple ports (5061, 10061, 15061).

   • Checked firewall settings (iptables) and confirmed no restrictions.

   • Rebuilt Kamailio from source and ensured TLS modules are linked to OpenSSL.

   • Ran Kamailio with maximum debugging (-ddd) to examine logs—no binding-related errors appeared.

4. Log Excerpts: (Attach relevant logs showing TLS initialization or lack of binding activity.)

5. Question: What additional steps or configurations should I explore to resolve this issue? Could this be a compatibility problem between Kamailio 5.7.4 and OpenSSL 3.0.13?

Any guidance or insights would be greatly appreciated!

Best regards, Steven Muchwe Njoroge