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