More than one firewall in one server

["Victor Rodriguez Cortes" <victor.rodriguez@valmesa.es>]

	Hello list,

	I'm planning on using one powerful server to act as a router/firewall to manage 5 
zones. Something like this:

ADSL1 (2Mb/320kb)-----|--------------|-----DataInternet
                                       Router/FW
ADSL2 (2Mb/320kb)-----|--------------|-----External DMZ (protected from DataInternet)
LAN-------------------------------|   |-------------Internal DMZ (protected from LAN)


	LAN will reach the internet through ADSL1 and ADSL2, loadbalanced by the firewall. 
Both DMZ's will reach internet via the DataInternet link. I'm planning on using Shorewall.

	Anyone has used a similar setup? I would like to know some experiences with this 
kind of setup, pitfalls, advantages and basically if it would be better to implement it using 
different machines instead of only one big server, both for performance and for the every day 
operation.

	Thank you!
	Victor.