simple www forum software ?

[Frank Bonnet]

Hi

I'm searching for a simple www forum software
I've found phpBB but it seems overkill for my needings
flat files would be enough as the forum will serve
20 users max and a very low traffic.
The goal is to share technical problems/solutions between around
20 sysadmins of multiples sites.


I need a very basic forum that could manage several groups
and a basic authentication with apache2.

Thanks for any help , the server runs 5.3

-- 
Cordialement/Regards
Frank Bonnet