Re: mss to pmtu clamping partially broken?

On Mon, 2 Jul 2007, Phil Dibowitz wrote:

On Mon, Jul 02, 2007 at 07:04:12PM +0200, Andreas Steinmetz wrote:

Jan Engelhardt wrote:

Do you really need clamping? It's a hack, since TCP should do MSS negotiation
itself. (Of course it may happen that some routers are broken.) But usually not
for incoming packets.

You never know when you hit ICMP blackholes, broken routers and other
evil things. Better safe than sorry so clamping is the way to go for me.

I encourage you to report PMTUD Blackholes to the MSS Initiative at
http://www.phildev.net/mss/

Any chances for similar initiative for "SACK vandals"? ;)

Best regards,

				Krzysztof Olędzki

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