At 09:08 AM 6/2/2003 -0500, James Miller (office) wrote:
I understand that in the world of Linux network security, generally older
= worser (more insecure).  So, I see that Freesco, a small Linux
gateway/router distro that seems to be actively maintained, is using a
kernel from the 2.0.x line - 2.0.38 (I understand that the most
recent 2.0.x kernel is 2.0.39).  Is Freesco considered an insecure
gateway/router distro because it uses this older kernel line, or can it be
expected to provide adequate network security?  What would be the risks
involved in using such a distro?  Would the security savants on this list
recommend against using it?


I have not looked at Freesco in a long time (years, really). Were I to consider using it, I would worry not about the old kernel but about old, insecure apps. Since I don't know what apps it runs, I cannot be specific here. But over the past 2 years, we've seen security updates to BIND (named), ssh, ssl-libraries, I believe even libc6 (glibc), and a lot of others I can't name off the top of my head.

So I would look to see if Freesco is doing regular security updates to applications and libraries that provide whatever services it makes available.

The issue with 2.0.x kernels (the issue I know, anyway) is that they do not support the fancier routing capabilities of 2.2.x and 2.4.x kernels ... for example, their NAT'ing code is more primitive, they don't provide connection tracking, they are less flexible in handling 3-NIC (e.g., DMZ) setups, and they log less intelligently. Whether these limitations matter depends on the particulars of your routing needs.

Here, I run a NAT'ing router using the 2.4.x kernel and built on Debian-Woody. Were I to use a small-Linux rourer distro, I'd probably use LEAF/Bering or LEAF-Dachstein (depending on the details of my requirements ... the two variants have different frop-in firewall packages available).



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