dns tunnels a threat?

[Gunther Mayer]

David Bird wrote:
> Hello,
>
> How many people consider dns tunneling a real concern? Just curious...
>
> Never heard of it? see http://dnstunnel.de/
>
> It could be a simple matter of dropping DNS packets with TXT records 
> before authentication. No?
Wow, I always knew this was possible in theory but for the lack of 
practical solutions I heard of I never paid too much attention to it. 
Guess I'll now definitely chuck in that iptables dns redirect rule when 
I get around to enabling anydns...