[CentOS] Strange httpd problem

Fri Jul 13 22:56:46 UTC 2012
Gordon Messmer <yinyang at eburg.com>

On 07/11/2012 12:22 AM, Eric Viseur wrote:
>   To ensure there are no interference with the monitor interface, I set
> iptables to drop all the outbound traffic on eth1 and httpd in bound to the
> IP address of eth0, but I randomly become unable to contact the webserver;
> Any clues why this is happening ?

Not off hand, but you could help by posting the configuration file 
containing your rules instead of a vague description of it.  There's not 
really enough to go on yet.

Rules dropping outbound traffic on the un-numbered interface are 
extraneous.  If the kernel doesn't have an address on that interface, it 
won't have any routes assigned to that interface either.  Hence, no 
traffic will be directed out of the un-numbered interface.  If you list 
your rules with "iptables -L -v" you'll see the packet counter on that 
rule has 0 hits, because it's never used.