Re: NAT stops forwarding ACKs after PMTU discovery

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On Mon, Aug 19, 2013 at 06:58:05AM -0700, Eric Dumazet wrote:
> Yeah, but here, this is conntrack who is blocking the thing.
> 
> TCP receiver has no chance to 'fix' it.
> 
> See conntrack is one of those buggy middle box as well.
> 
> So if you want to properly handle this mess, you'll also have to fix
> conntrack.

Better to fix the box which is randomizing the acks and ignoring
the SACKs.  Usually these are older Cisco PIX/ASA devices which just
need a code upgrade.  

Phil
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