linux-kernel - Re: How to find a sick router with 2.6.17+ and tcp_window

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Message-ID: <45080EE2.8030602@everytruckjob.com>
Date:	Wed, 13 Sep 2006 09:00:02 -0500
From:	Mark Reidenbach <m.reidenbach@...rytruckjob.com>
To:	linux-kernel@...r.kernel.org
Subject: Re: How to find a sick router with 2.6.17+ and tcp_window_scaling
 enabled

Willy Tarreau wrote:
> On Tue, Aug 15, 2006 at 02:53:33PM -0500, Mark Reidenbach wrote:
>   
>> Willy Tarreau wrote:
>>     
>>> He may very well have an IOS based 1600 or equivalent doing a very dirty 
>>> NAT.
>>>
>>> Willy
>>>
>>>  
>>>       
>> Willy, I am in fact running an IOS based NAT/firewall on a 1811.   It's 
>> IOS version 12.3(8)YI1.  Do you know if this version has a "very dirty 
>> NAT" implementation?   If you don't, I think I'll just try a few spare 
>> home routers and see if their NAT implementation is cleaner than my Cisco's.
>>     
>
> I have absolutely no idea. If they borrowed the session tracking code from
> the PIX, you might have window tracking inside it, which might cause what
> you observe if it's buggy. But that's just supposition from me.
>
>   
>> Mark Reidenbach
>> EveryTruckJob.com
>> M.Reidenbach@...ryTruckJob.com
>> Phone: (205)722-9112
>>     
>
> Regards,
> willy
>
>   

I'm just posting this as a follow-up in case anyone runs across the same 
problem I experienced and couldn't find a solution.  My problem was the 
old Cisco IOS [Version 12.3(8)YI1] that came installed on my Cisco 1811 
router I purchased in March 2006.   I believe this is still the default 
shipping version for this router, so anyone who buys one really needs to 
get a Cisco support contract for it from a Cisco reseller so they can 
download a new/working IOS [Version 12.4(9)T1 was the most recent as of 
this email and was the one I used]. 
Mark Reidenbach
EveryTruckJob.com
M.Reidenbach@...ryTruckJob.com
Phone: (205)722-9112

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