[Openswan Users] UDP fragmentation in Linux

[Marcus Leech]

Rolf Offermanns wrote:

> Hmm...
> This is what I got on my system (see attachment).
> Not what you would expected, right?
> This is debian-sid (2.6.10-1-686-smp).
>
> -Rolf
>
>------------------------------------------------------------------------
>
>19:20:35.724863 IP (tos 0x0, ttl  64, id 9880, offset 0, flags [+], length: 1500) 172.22.10.10.33864 > 10.0.0.10.555: UDP, length: 3000
>19:20:35.724884 IP (tos 0x0, ttl  64, id 9880, offset 1480, flags [+], length: 1500) 172.22.10.10 > 10.0.0.10: udp
>19:20:35.724893 IP (tos 0x0, ttl  64, id 9880, offset 2960, flags [none], length: 68) 172.22.10.10 > 10.0.0.10: udp
>
That appears to be the correct behaviour.

Do you run iptables on your system?  What sysctl variables do you have set?