You can use tcpops tcp_enable_keepalive ( http://www.kamailio.org/docs/modules/devel/modules/tcpops.html#tcpops.f.tcp_...) to enable tcp keepalive per connection.
On Sat, 28 Nov 2020, 16:47 sergey-safarov, notifications@github.com wrote:
If the client does not send TCP keep-alive SIP message or TCP session timer on NAT router is too low then we have an issue.
As a workaround, I can use the operation system keepalive on the server-side.
net.ipv4.tcp_keepalive_time = 75
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