Set Up Ubuntu-Server 6.10 As A Firewall/Gateway For Your Small Business Environment

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Ubuntu
HowTos

This tutorial shows how to set up a Ubuntu 6.10 server (Edgy Eft) as a firewall and gateway for small/medium networks. The article covers the installation/configuration of services such as Shorewall, NAT, caching nameserver, DHCP server, VPN server, Webmin, Munin, Apache, Squirrelmail, Postfix, Courier IMAP and POP3, SpamAssassin, ClamAV, and many more.

http://www.howtoforge.com/ubuntu6.10_firewall_gateway