I'm receiving the error below in my ASA logs for users connected to remote access VPN. I have a couple of site to site tunnels configured on the ASA as well. The error appears more for some users than others, but has appeared for every user that has so far connected via remote access VPN. It doesn't seem to affect their connection, but of course I was hoping to find out what is happening.
4 Jan 19 2007 16:05:12 402119 18.104.22.168 61.282.187.140 IPSEC: Received an ESP packet (SPI= 0x3AE53F8D, sequence number= 0xD12) from 22.214.171.124 (user= ballb) to 61.282.187.140 that failed anti-replay checking.
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...