iptables -A firewall-output -p udp -m state --state NEW -m udp --dport 6666 -j ACCEPT </pre><BR><BR>With them (along with others) I can use netcat to do basic communication over UDP. However, when I ...

I have a customer who has a simple Linux box that was not set up with iptables. It's a simple RH 3EL box that only has a web server, ftp, and ssh. Lately, she has been getting HAMMERED by ftp and cgi ...

Most of us think of iptables strictly as a firewall tool for keeping remote attackers at bay. But did you know it also can be used to keep local users in line? The experimental match extension owner ...

Linux's iptables allows powerful firewalls to be implemented at a minute fraction of the cost of many commercial offerings. Basic iptables firewalls are packet filters, which means they inspect the ...