Best firewall gateway version of Linux ?

[Ian Matters]

>Could someone with experience of Gibraltar/Smoothwall
>  say what the CD activity is like?
>Does it let the CD spin down and sit once it has booted?
>
>That would require a decent complement of ram, say 64 Meg or 128 Meg?
I run Smoothwall 0.99 on my small network.  The machine is an old '486 with 
about 500MB of HDD and 32MB of RAM and is quite adequate for the 
job.  Smoothwall does require a hard drive.