on sme 5.5 dns zone transfer: (in /etc/rc.d/init.d/masq)
ipchains -A input -i $EXTERNAL_INTERFACE -p udp
-s $ANYWHERE 53 -d $OUTSIDE_IP 53 -j ACCEPT
ipchains -A input -i $EXTERNAL_INTERFACE -p tcp
-s $ANYWHERE 53 -d $OUTSIDE_IP 53 -j ACCEPT
Howto on sme 5.6 ???