Kamailio TLS Listener Not Binding to Port (5061 or 10061)

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

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