I have an ASA5520 that has 70 LAN-to-LAN tunnels currently attached to it. Frequently something out on Internet causes some of the tunnels to drop (Today it happened to be several of my Comcast cable sites). I have (2) Cisco 3005 Concentrators that I previously used for VPN tunnels that are currently just handling client access. I can enable any of the suspect tunnels from the ASA onto the 3005 and the tunnel immediately goes active.
Has anyone else experienced this issue? Is there some type of setting (MTU?) that allows the 3005 to connect even when the ASA5520 will not? I have tried contacting the provider in the past with no success.
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...