[geeks] How to block an entire domain?

[Geoffrey S. Mendelson]

On Wed, Oct 10, 2007 at 10:35:47PM -0500, Micah R Ledbetter wrote:
> On Oct 10, 2007, at 16:56, Geoffrey S. Mendelson wrote:

> This may not be relevant to you, but undernet is a normal, legit IRC  
> network. Additionally, since its one of the more popular networks,  
> there are a lot of linked servers, so blocking access to something  
> called "undernet.org" isn't going to fix the problem of connecting to  
> the undernet network in general, even though it would fix the problem  
> of this particular trojan.

To be honest, I don't use IRC and neither does my wife and middle son.
Of course the day I block the protocol and ports, my youngest son will
announce he as learned to read and wants to IRC with his schoolmates.
:-)

Someone else suggested that I stop DNS lookups for the domain, and I did.
However, I'm still interested in finding out how I could traverse a
DNS "tree" and get all the IP address that belong to hosts in the 
domain and subdomains.

A general suggestion would be fine, I don't expect to find a ready made
program to do it.

Thanks,

Geoff.

-- 
Geoffrey S. Mendelson, Jerusalem, Israel gsm at mendelson.com  N3OWJ/4X1GM
IL Voice: (07)-7424-1667 U.S. Voice: 1-215-821-1838 
Visit my 'blog at http://geoffstechno.livejournal.com/