From mboxrd@z Thu Jan  1 00:00:00 1970
From: Boryan Yotov <yotov@prosyst.com>
Subject: Re: HTTP slower than SSH on client behind iptables
Date: Tue, 31 Jan 2006 10:18:26 +0100
Message-ID: <43DF2B62.5030205@prosyst.com>
References: <20060131033519.GA32564@bostoncoop.net>
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Adam Rosi-Kessel wrote:
> I have a standard NAT box; the essential configuration for discussion
> purposes on the box is just IP masquerading.
> 
> On the NAT box, my Internet connection goes up to about 700 kilobytes per
> second, regardless of the protocol used (e.g., ssh or http).  
> 
> On clients behind the NAT box, however, HTTP connections seem to top out
> around 70 kilobytes per second. ssh connections (e.g., rsync) get the
> full throughput of the Internet connection.
> 
> As far as NAT goes, I don't hvae any special settings.
> 
> Can anyone think of an explanation for this behavior? It doesn't make any
> sense to me.

Are you sure, you don't have some kind of a traffic shaping
active on the NAT gateway's internal interface?

For example: If tc is used, you could check that using:

tc class show dev <nat_box_internal_interface>

and

tc filter show dev <nat_box_internal_interface>