Having trouble with a L2L VPN between a ASA5520 and Checkpoint NGX. Traffic passes through just fine for most users but we are seeing problems where some users (but not always the same users) are unable to connect. I'm seeing
Inbound TCP connection denied from x.x.x.x/1171 to y.y.y.y/80 flags SYN on interface Outside.
My understanding of this is the ASA is seeing a new connection coming in (SYN flag is set) but the ASA thinks there is an existing connection it should be using.
Any ideas on what would cause this and if there is anyway to clear the connection for a single IP address?
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...