Re: Network/PPP bug?

Alan Cox (alan@lxorguk.ukuu.org.uk)
Tue, 31 Mar 1998 20:55:54 +0100 (BST)


> I have heard this a few times, but there is something that still doesn't
> add up for me. If it were solely a PMTU problem on the remote end,
> wouldn't that bar my own system from communicating with them also? In my

No

> case, my Linux box has no troubles reaching the sites; only the masqueraded
> systems behind it do.

Yes. Your host knows the MTU of its ppp link is low and sends a lower TCP
MSS, thus the problem is hidden. I guess you could write

ip_masq_brokenshites.o

and rewrite the TCP MSS too. Otherwise what I said is right and stands validly

Alan

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