Re: How to find a sick router with 2.6.17+ and tcp_window_scalingenabled

[Alan Cox]

Ar Maw, 2006-08-15 am 11:05 -0500, ysgrifennodd Mark Reidenbach:
> Does anyone have a way to find the broken router if you are not running 
> the networks involved?  

You are almost certainly looking for a broken/crap NAT box, firewall or
similar product. Routers that are just being routers don't touch the TCP
layer so even if they are broken/crap/ancient they won't do any harm to
it.

The usual offenders are cheap NAT boxes and badly designed load
balancers. They may not even show up in a trace but you should expect
them to be at one end or the other, unless your ISP is providing you
with NATted addresses or some kind of managed security service.

Alan
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