Optimal firewall setup

[Rich Beams]

Ivan,

Could you suggest an optimal firewall setup for Freeside.  2 servers: 1 for
public web, RADIUS, and email ... the other for Freeside.  I've read in the
email archives that a few people had wierd problems with some hardware
firewalls.  If hardware is recommended, what product (small 4-5 port to
start with) is reliable with Freeside?  And should the firewall be placed
only to isolate the Freeside server or in front of both servers with NAT to
the web/RADIUS/email server?  If a software firewall is ok, which one would
you use and how would you configure it?

Thanks in advance.

Rich