Linux – server will not reply (syn -ack)

kernellinuxnetworkingtcp

I like to use the following commands to manage 'TIME_WAIT', in the hope to free up resources.

echo 20 > /proc/sys/net/ipv4/tcp_fin_timeout
sysctl -w net.ipv4.tcp_tw_reuse=1
sysctl -w net.ipv4.tcp_tw_recycle=1

I found something interesting while doing a tcpdump. Sometimes if a client makes a connection (syn), the server will not reply (syn -ack).

My question is, could it be because of the top three commands.

Best Answer

Apparently, yes: http://www.gadgetwiz.com/administration/kernel.html

I can't explain why, though.

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