Best Practices for Enterprise networks

["Tracy Smith" <TSmith () illinois net>]

Hello.  I am tyring to gauge what the Best Practices are for Enterprise network connections to the Internet.  
Specifically, to NAT or not to NAT?  At what point should NAT-ting be performed ... exclusively at the Egress point or 
at decentralized points?  What about firewalling - centralized/decentralized?

Thanks in advance for any feedback!

Tracy Smith
tsmith () illinois net