I understand you need information on what this RegEx string will match against. Here is a breakdown:
- The (?i) means 'case insensitive'. - The \\ characters make the [ and ] characters literal. - Abcde has no special meaning - it is treated literally be default.
So this string is looking for Subjects that contain strings similar to these:
[abcde] [ABCDE] [aBcDe]
I do not know if any use case where one would search for that particular phrasing. However, this style of filter is very common for CRES Encryption setups. If that is the use case here, you will want to make sure that the text matches what your users are told to add to their Subjects when they desire Encryption.
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...
[toc:faq]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 and UDP are I...