mss to pmtu clamping partially broken?

Andreas Steinmetz ast at
Mon Jul 2 19:02:15 CEST 2007

Patrick McHardy wrote:
> Its possible that one of your ISPs is doing clamping. You could
> check on ppp0 if thats the case. Or maybe for some reason the
> PMTU value for the internal host is smaller than 1500. You can
> check that by doing "ip route get <internal host>".

Oh well, thew fun with ISPs. Same provider, clamping on one line but not
the other. This is fun :-(

Andreas Steinmetz                       SPAMmers use robotrap at

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