Karsten,

Thanks for your answer!

Out of your head, were there any significant changes in TCP/TLS on 5.4 -> 5.5 change?

Regards,
Igor

Hi Igor, 

I also use CentOS 7 with the same openssl version and between 1000 up to 2000 tls/wss connections. 

Works for me. Main difference I use Kamailio 5.5.x

Kind regards 

Karsten Horsmann 

Igor Olhovskiy <igorolhovskiy@gmail.com> schrieb am Mi., 22. Juni 2022, 10:36:

Hello!

Due to I still experience irregular Kamailio 5.4 crashes (like 1/month) related to SSL (using websockets and SIPS) I'm wondering, could openSSL upgrade change the situation?

As of now in CentOS 7 I have 1.0.2k version.

Does anyone have experience to fix crash-related to TLS problems with openSSL upgrade?

Or maye some tuneup of TCP parameters can help here?My current setup is quite simple:

children=4

enable_tls=yes
tcp_accept_no_cl=yes
tcp_connection_lifetime=600
tcp_max_connections=998976 # 1000000 - 1024, so we're leaving 1k for system reserve
tls_max_connections=998976

Number of clients ~ 200 constantly connected to websocket.

--

Best regards,

Igor

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