Hi, I'm using iptables on RedHat 8 with the rules listed below. When scanned from outside the TCP port appear as filtered; however, the UDP port is still open. $ip0 is my external IP address. Am I doing something wrong? ------------- /sbin/iptables -A INPUT -i lo -p all -j ACCEPT /sbin/iptables -A INPUT -p tcp -d $ip0 --dport 53 -j DROP /sbin/iptables -A INPUT -p udp -d $ip0 --dport 53 -j DROP __________________________________________________ Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now. http://mailplus.yahoo.com