Re: Having trouble properly configuring my firewall

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Jan Engelhardt wrote:
On Tuesday 2012-04-24 10:49, John Lister wrote:

8-A FORWARD -o ppp0 -p tcp -m tcp --tcp-flags SYN,RST SYN -m tcpmss
--mss 1400:65495 -j TCPMSS --clamp-mss-to-pmtu

One does not really need TCPMSS, for there is PMTUD.

Hmm, did someone mend the internet for pppoe users, or maybe I misunderstand what you mean.

-m tcpmss --mss 1400:65495

looks redundant. I suppose you really need to assess your own situation in any case (I had an ISP once that for a while caused 64k mtu on ppp).

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