[CentOS] Not firewall, but what?

[Gavin Carr]

Is one of your dns servers broken?

On Thu, May 06, 2010 at 09:31:22PM +0300, 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
> - the problem-clients get timeout with their browser
> - they get timeout also when they try a numerical ip address
> - but they see another machine in the same subnet just fine (when they 
> browse by ip number), so the problem has to be inside this webserver 
> box, right?
> - port 80 (not ssl)
> 
> Switching off iptables does not help. The files hosts.allow and 
> hosts.deny are empty, so I guess it's not the tcp wrapper.
> 
> I am out of things to test. Any ideas?
> 
> - Jussi Hirvi