Some time it is necessary to increase or decrease timeouts on TCP sockets. You can use /proc/sys/net/ipv4/tcp_keepalive_time to setup new value.
The number of seconds a connection needs to be idle before TCP begins sending out keep-alive probes. Keep-alives are only sent when the SO_KEEPALIVE socket option is enabled. The default value is 7200 seconds (2 hours).
For example set value to 2400 seconds:
echo 2400 > /proc/sys/net/ipv4/tcp_keepalive_time
You can make changes to /proc filesystem permanently using /etc/sysctl.conf
Further reading
- See man page of ip(7) and tcp(7) for more details.
- Securing and Optimizing Linux book (by OpenNA), network optimization chapter
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Thanks!
Thank you for this note.
But I still have a question
tcp_keepalive_time means that socket connection will be killed in 2 hours (by default) in any case or if socket connection is not active (messages are not sending)?