Date: Sat, 07 Feb 2004 01:28:25 +0100 From: Thomas Vogt <turbo23@gmx.net> To: freebsd-ipfw@freebsd.org Subject: ipfw2/dummynet set new mss on thy fly Message-ID: <40243129.7060400@gmx.net>
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Hi Is it possible to modify the mss with ipfw2/dummynet? This is necessary to fix wrong window implementations for example for adsl providers. Something like "modify mss=1452 tcp from any to any out recv em0 xmit em1 tcpflags syn". (Of course this string is wrong, it's just to give you an impression). I know there is tcpmssd port but it uses divert. I've to modify every packet on gigabit lan (at least 200mb/s traffic). So tcpmssd is a bit to slow. We already have a ipfw1 patch and It's not that difficult to port it to ipfw2. But I'm not sure if ipfw2/dummynet already have something similar implemented by default. Any hints? cheers, Thomas
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