TCP MSS clamping – what is it and why do we need it?

Ivan hits it right on the head again. Thanks.

This (not so very) short video explains what TCP MSS clamping is and why we’re almost forced to use it on xDSL (PPPoE) and tunnel interfaces (TL&DR summary: because Internet-wide Path MTU Discovery rarely works).

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via TCP MSS clamping – what is it and why do we need it?.

 

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