[OpenSIPS-Users] I need to understand when from opensips ser "TCP Zero Window" message get generated .

Sasmita Panda spanda at 3clogic.com
Thu Feb 13 05:14:22 UTC 2025


Hi ,


I have a server running on opensips 2.2 version (Yes that is very old I
know , we are planning to upgrade that in near future ) .

On that server I have set up the gateways with TCP socket connection .
Openisps while sending outbound calls to the gateway give the call in TCP .

>From the last 2/3 months we observed , randomly sometime in 7days or 10/12
days the connection won't get established and calls get affected .

Once we restart the opensips service things start working fine .  So here
is opensips blocking something ? or is it on my linux machine blocking the
connection ?

For the proto_tcp module I have not configured any parameters . just loaded
the module . I am hoping the default values must be in use .

Can anybody suggest to me what I need to debug here ?

*Thanks & Regards*
*Sasmita Panda*
*Senior Network Testing and Software Engineer*
*3CLogic , ph:07827611765*
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