[CentOS] Not firewall, but what?

[Paul Heinlein]

On Thu, 6 May 2010, Jussi Hirvi wrote:

> I have a strange problem, where some clients see the website on my
> server and some do not. It is not about the iptables, and seems to be
> not about tcp wrapper. Still it is something within the box.
>
> More details:
> - the problem is only with some clients, with no geographical connection
> between them; other clients see the website just fine

A while back, I remember there was a problem with TCP window scaling 
that would impact only some clients in a way that you describe:

   http://lwn.net/Articles/92727/

-- 
Paul Heinlein <> heinlein at madboa.com <> http://www.madboa.com/