Re: Setting MTU size for ppp0
Hmm, that rule is setup (was done by pppoeconf upon configuration).
Actually, everything seems to be fine, except that the machine behind linux can´t
open or ping www.ebay.de / or www.ebay.com.
Other randomly picked sites work just fine.
On the linux (router) machine I can open ebay in a browser, but I cannot ping www.ebay.de
from the router machine.
I am "guessing" on MTU size, since pppoeconf and some other how-tos recommend to decrease to 1412 if the
machine is used as a router and is doing masquerading.
However, first priority question was, if somebody knows which daemons and/or scripts
could be interfering when setting MTU size for ppp0. I don´t know if the mentioned
"clamp-mss" rule could be the reason.
thanks in advance for the help,
Nicos Gollan schrieb:
On Sunday February 27 2005 02:23, Sven Nielsen wrote:
I am trying to limit MTU size on ppp0 to below 1492 (that is, I want 1412)
because my (new) linux machine has to masquerade for my roommate (winXP
home). I set up pppoe with pppoeconf which configures MTU for ppp0 to 1492.
There's kind of a generic "make-DSL-work"-rule for iptables:
-A FORWARD -p tcp -m tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
So as long as the system is able to determine the PMTU, you should be fine.
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