Can we enable keepalive from client side socket also?

Question

When I did netstat -anto , I got the following output

Proto Recv-Q Send-Q Local Address               Foreign Address             State       Timer

tcp        0      0 127.0.0.1:1169              127.0.0.1:40238            ESTABLISHED off (0.00/0/0)

I guess off means that the keepalive timer is off.

Can we enable keepalive from client side socket? Or it can be enabled only for server-side code? How to enable it from the client?

Answer 1

You can enable SO_KEEPALIVE from any side. Just remember that the default ping-time and timeout is very long, the ping time is by default usually two hours, for example.