[DNS reverse-lookup]

[Lennart Sorensen]

On Fri, Jan 23, 2004 at 08:58:47AM -0500, GDHough wrote:
> I've recently installed a Linux OS on a 1200 series ThinkPad. It has a 
> winmodem entangled with it's sound card so neither work. I tried a usb 
> linksys adapter for a nic, but kernels<2.4.21 don't support it (ax8817x.o). 
> So I opted for a linksys PCMCI card and it is fully supported.
> 
> My question is what causes a reverse lookup of 224.0.0.251 at 4:03 am from 
> this adapter and how can I stop it?

224 adresses are multicast packets.  You can filter them if you want.
They are used my multicast audio and video streams to save a lot of
bandwidth (multicast enabled routers keep track of who is connected to a
stream and duplicate packets to each destination as needed while they
only need to receive one copy.)

Lennart Sorensen
--
The Toronto Linux Users Group.      Meetings: http://tlug.ss.org
TLUG requests: Linux topics, No HTML, wrap text below 80 columns
How to UNSUBSCRIBE: http://tlug.ss.org/subscribe.shtml