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I've been told the IP reassembly timeout is 30 seconds, but I just need some clarification please

It'll be great if it was from Ubuntu too, as I need to reference it!


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1 Answer 1

The TCP reassembly time in the Linux kernel is indeed 30 seconds by default.

You can check the setting on your system by looking at:

cat /proc/sys/net/ipv4/ipfrag_time

You can change the timeout as well:

sudo echo 60 > /proc/sys/net/ipv4/ipfrag_time

To make the change permanent, add to your /etc/sysctl.conf (or a new file in /etc/sysctl.d directory) (sudo required to edit these files):

net.ipv4.ipfrag_time = 60

and run sudo sysctl -p to apply the change immediately.

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Thank you very much. I will test this when I get hime –  Mr E A Aug 24 '12 at 16:36

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