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HelpNet Security: Commenting a firewall

Jul 28, 2001, 21:16 (1 Talkback[s])
(Other stories by Aleksandar Stancin)

[ Thanks to LogError for this link. ]

"Now, in order to use it you'll have to upgrade to a 2.4.x kernel, and compile the support for iptables in it. So, go to /usr/src and find your kernel source. Notice that the location may vary, but in most cases it is /usr/src. By typing 'make menuconfig' you can get to the options that are needed for iptables. Select all neccessary, save changes and exit. From there it's pretty much the same old story (make dep, make clean...). If you're new to kernel compilation, you can read more on it in my older article, wich can be found here.

Notice: use the latest version of iptables, which is iptables 1.2.2. Some older versions had some security flaws due to code vulnerabilities. Newer versions have this bug fixed. Also, I would advise you to frequently read news at the Netfilter homepage for updates and bug reports.

If you're familiar with ipchains, you should be able to easily manipulate the iptables syntax. If not, feel free to read on..."

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