Re: Linux Server software recommendations firewall proxy email fax etc
It looks like your list is fairly complete. However, I have a hard time recommending software without knowing more about the company.
Off hand though, I'd say build the firewall by hand - iptables in your own script. I would also suggest that you just use the command prompt to do your networking config - a simple text editor and the command prompt is all you'll need for network config and firewall.
Is a proxy really necessary?
I don't know about some of the others like fax software... *shrug* sorry.
If this is a business, I would suggest going to something like the new Lotus Notes/Domino Express package. I know you can replace many of the functions with free software, but the Domino package integrates much easier than a collection of 3rd party products. It would handle all of your e-mail, ldap and http needs as well as allow you room to grow into the instant messaging arena - I think they even have a deal for 20 free SameTime licenses with the purchase. Domino does run in linux and if you ever decide to grow your infrastructure, you can use the kick-ass components to get it working through WebSphere Portal... I digress.
<flame suit off>
If you are going for all freeware then the above won't help you.