I just went with the Barracuda Networks Web Filer (formerly known as spam filter) I can stop chat clients, spam, pretty much what I want - and it's deployed in the DMZ @ the gateway.
Baracuda Web Filter Demo
uname: guest
passw: spyware
check it out
I bought the 420 I think
I've attempted to allow ftp access to the dmz only buy using the following access-list entries:
access-list 102 permit tcp any 10.1.1.0 0.0.0.255 eq ftp log
access-list 102 permit tcp any 10.1.1.0 0.0.0.255 range 9000 9010
then - noone can get to my ftp server from the outside...
so I tested...
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