From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <10b109140809131214h321eb52et68cb1e76ccd084ef@mail.gmail.com>
Date: Sat, 13 Sep 2008 21:14:05 +0200
From: "Antonin Vecera" <antonin.vecera@gmail.com>
To: "Fans of the OS Plan 9 from Bell Labs" <9fans@9fans.net>
In-Reply-To: <fa087072c9f25723858d780360edc4e8@quanstro.net>
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References: <10b109140809121028k477d0881ve3d2c860b85c9d69@mail.gmail.com>
	<fa087072c9f25723858d780360edc4e8@quanstro.net>
Subject: Re: [9fans] patch/create problem (error?)
Topicbox-Message-UUID: 10d8f9e0-ead4-11e9-9d60-3106f5b1d025

On Fri, Sep 12, 2008 at 8:16 PM, erik quanstrom <quanstro@quanstro.net> wrote:
>> Anyway, does 9P and Plan9 know about "path MTU discovery"?
>
> traditional path mtu uses icmp messages.  if your router/modem/whatever
> eats icmp, you're outta luck with these traditional methods.
> cf. http://www.netheaven.com/pmtu.html  i think there are some tricks
> to get around the missing icmp messages, though.
>
>> Or have I something wrong at my firewall/router?
>> Other of my computers (FreeBSD,Windows) don't have such problems.
>
> have you tried mounting sources from these machines?
>
> i think this problem is pecular to sources.  if the pmtu is
> symmetric, it seems sources is a few bytes short of a full packet.
> 1510 bytes.  yet when i read from a local machine, the tcp
> packets are a bit long of a full packet -- 1518 bytes.
>
> something to look into.
>
> - erik

I solved it.
The source of this problem was an old NAT program on my router.
Thanks Erik, you show me where to look for it.

Antonin