HI
We have some Red Hat Linux Sevres which is having TCP connection timeout, not SSH connection, as an example oracle connection connected from TOD.
SSH i managed to add keepalive and it's working fine
Linux has built-in support for TCP keepalive. You need procfs and sysctl support to be able to configure the kernel parameters at runtime.
The procedures involving TCP keepalive use three user-driven variables:
tcp_keepalive_time
the interval between the last data packet sent (simple ACKs are not considered data) and the first keepalive probe; after the connection is marked to need keepalive, this counter is not used any further
tcp_keepalive_intvl
the interval between subsequential keepalive probes, regardless of what the connection has exchanged in the meantime
tcp_keepalive_probes
the number of unacknowledged probes to send before considering the connection dead and notifying the application layer
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