we are using the IPS version 6.1(1)E1 (IPS-K9-6.1-1-E1) and the latest version of the signature update is S338.0
on Cisco site it looks like for the signature updates S338 is the latest version but when i connect to my device the sensor health shows critical and in the details i see the signatures updates is old and event retrieval not retrieved!!!!
Signature updates have latest version corresponding to each Engine version. Since you are at E1 version the signature update stopped at S338 level. The Engine E2 version has the latest signature update version of S364 and E3 has the current latest version of S475. That may be the reason why sensor health shows the sig update as old version. To get a latest sig update upgrading to higher Engine level may be considered.
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...