I agree with you about the virtual web sites, however you could also look at it this way. Mostly all attacks are done on ports that are well known and that are default, like 80, 21, 23, 53 etc... and changing them would put more work on the hackers.
I would love to stagger all my ports to anything other than the default, but at the same time, this would cause me alot more work, having to deal with everyone else and modifying their applications default settings.
But again I would still have to open those ports to the servers in the DMZ defeating the purpose of changing ports.
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...