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Date:	Thu, 05 Apr 2007 14:16:53 +0200
From:	Patrick McHardy <>
To:	Herbert Xu <>
CC:	Linux Netdev List <>
Subject: Re: IPsec PMTUD problem

Herbert Xu wrote:
> On Thu, Apr 05, 2007 at 02:09:20PM +0200, Patrick McHardy wrote:
>>>One possible solution is to not send MTU errors to ourselves since
>>>we it wouldn't give us any new information.  We'd need to audit the
>>>users of icmp_send to make sure that there isn't a legitimate case
>>>where we'd want to do that.
>>One such case is delivery of errors to sockets. We'd need to make
>>sure the errors are delivered some other way.
> Alternatively we can still send the ICMP error but avoid a PMTU
> update if we received it from ourselves.

That sounds easier. I'm currently working in that area anyway, I'll
give it a try.

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