This can provide clues as to a fragmentation issue in the network. Consumer routers are particularly poor at packet fragmentation and reassembly.
Try a scaling set of pings to see if it fails at a certain size. For example, ping -l 500, ping -l 1000, ping -l 1500, ping -l 2000.
It is recommended that you configure a special group for users that experience fragmentation, and set the svc mtu for this group to 1200. This allows you to remediate users who experience this issue but not impact the broader user base.
Now it does work ... 3 days already and from both sides seems to be OK, at least "disconnect" button is available. Only thing I see now is that clock stopped on AnyConnect tab (I mean connection time), it show 21:04:28. Hope it is just ... cosmetic issue.
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...