Building Network Appliances With Linux, Part 6: Running Servers
In the previous installments of this series, we built a good, solid iptables firewall on Debian Linux. Last week we left off with testing and activating the firewall. At this point your firewall blocks all incoming connection attempts, and allows only connections initiated from inside your LAN, such as checking e-mail, IRC and Web surfing. If you are not running any public services you're all finished. If you want to run your own public Web or mail server you need to poke a hole or two in your firewall.
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