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From Richard de Vries <richard_devr...@yahoo.com>
Subject RE: [users@httpd] Apache listening for UDP requests?
Date Thu, 06 Jul 2006 13:24:48 GMT
I haven't had a whole lot of luck yet sniffing UDP
packets. I was able to get the sniffer runner, but
there is hardly any UDP traffic. What I think is
happening, is that these UDP ports are being used to
communicate over the loopback (localhost) adapter.

DNS resolution is disabled on these Apache instances,
so that's definately not it either.

The number of UDP ports seems to climb the longer
Apache is running.


--- Axel-St├ęphane  SMORGRAV
<Axel-Stephane.SMORGRAV@europe.adp.com> wrote:

> Could it possibly be for communication with a DNS
> server ? Have you tried sniffing UDP packets sent
> to/from this port?
> 
> -ascs
> 
> -----Original Message-----
> From: Richard de Vries
> [mailto:richard_devries@yahoo.com] 
> Sent: Wednesday, July 05, 2006 7:07 PM
> To: users@httpd.apache.org
> Subject: [users@httpd] Apache listening for UDP
> requests?
> 
> While debugging an issue on one of my apache
> webservers with lsof, I noticed the following:
> 
> httpd     16679     http   23u  IPv4 0x30008c5fa88  
>  
>    0t0      UDP *:41034 (Idle)
> httpd     16679     http   27u  IPv4 0x30008bf4d20  
>  
>    0t0      UDP *:* (Unbound)
> httpd     16679     http   28u  IPv4 0x30009526088  
>  
>    0t0      UDP *:* (Unbound)
> httpd     16679     http   29u  IPv4 0x300084f32e8  
>  
>    0t0      UDP *:* (Unbound)
> httpd     16679     http   30u  IPv4 0x30009590e68  
>  
>    0t0      UDP *:* (Unbound)
> httpd     16679     http   31u  IPv4 0x300094087f0  
>  
>    0t0      UDP *:* (Unbound)
> httpd     16679     http   32u  IPv4 0x30008edf0d0  
>  
>    0t0      UDP *:* (Unbound)
> 
> What does this mean? Is Apache listening for UDP
> requests? If so, why?
> 
>    Richard
> 
>
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