> > Hi,
> >
> > im running a dns server here and i'm not sure if the following rule is
> > enough to allow dns queries from everywhere:
> >
> > $IPTABLES -A INPUT -p udp --destination-port 53 -j ACCEPT
> 
> You should also allow TCP port 53.   DNS uses both.

As I remember, when clients query the DNS Server
the port 53/tcp is used, and when your server 
queries other servers, it uses the port 53/udp.



Best Regards,
-- 
Daniel Bastos
System Engineer
http://www.dbastos.net
GPG/PGP: http://www.dbastos.net/pgpkey.txt

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