I doubt much that the problem is tha nat translation, error message says no connection this means the TCP SYNC and SYNC/ACK reply are going different pathes so firewall will drop that reply. but to make sure the problem is not in the nat translation use this command:
and remove both the static nat commands
If you can post the configuration of your firewall it will be very helpful.
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...