[CLUE-Tech] Calling Grant

[Jeffery C. Cann]

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On Friday 16 March 2001 17:29, Cyberclops wrote:
> I appreciate the offer, but actually SuSE 7.1 has a firewall built in, 

FYI - All linux kernels (2.0, 2.2 and 2.4) have a 'firewall built in'.  The 
2.2 firewall is called 'ipchains'.  The 2.4 firewall system is called 
'netfilter' or 'iptables'.  This is not dependant on a particular 
distribution of Linux, it is a feature of the Linux kernel.  Distributions 
may provide utilities that assist in your configuration of a firewall, but 
that is a different story.

> As I understand it, security wtih the 2.4 kernel (which I am running is
> actually different and better than in the 2.2 kernel, 

Yes, since I have a 2.2 kernel and SuSE is running a 2.4 kernel, my ipchains 
script will not work.  However, there are migration scripts to convert the 
'ipchains' script rules to 'iptables' script rules.

Here's an introduction to netfilter/iptables:
http://securityportal.com/cover/coverstory20010122.html

Here's the 'netfilter' home page:
http://netfilter.kernelnotes.org/

Here is a tutorial for building a netfilter firewall.
http://securityportal.com/articles/netfilter20010219.html

Enjoy!
Jeff
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