not a problem, if it helps i have around 75 primary asa's and 30 secondaries utilizing 5510's and 5520's running asa 8.0.4, asdm 6.1.5 and the IPS modules are 6.1(2)E3 without any issues. I do have an issue with that IPS code level and that infamous smb bug that cause the IPS modules to fail and go into bypass mode, but nothing else.
If you decide to upgrade to the 8.x release on your ASAs, just keep watch of the memory uilization and features you enable
also keep in mind that the 8.0.x code has been in production for quite a while and the 8.2 branch was just released so not that many bugs/issues have been found as compared to 8.0.4 yet. a quick check on bugtoolkit showed 69 open caveats and 1121 fixed for 8.2.x as compared to 8.0.x with having 229 open and 1835 closed (it all relative). still, I want to upgrade but at the moment I am holding off as the memory requirements are a bit higher and if your ASAs are running low on memory you need to purchase the new memory upgrade kit(256mb-to-512mb). I have firewalls that vary in memory utilization so I would need to upgrade them in order to feel *safe about using the 8.2 code on them. Plus I will have to figure out upgrading the memory on ASAs that are in a remote data center that do not have a technical person onsite :) what fun haha
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...