From our research on the subject, we do not believe a high-fidelity signature can be created to detect this attack. The nature of the traffic used in the attack is legitimate and as a successful attack requires some guess-work and timing, there are too many variables to detect any sort of pattern in the traffic used. The initial part of the attack occurs when a user accesses a malicious link. Standard user training should mitigate this vector if users avoid accessing unsolicited links. Updates are also available to patch systems. For more information, please see Intellishield alert number 13831:
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...