Perhaps a common issue. Trying to build a tunnel from our Cisco 3030 to a Watchguard Firebox X20 Edge. No matter which side initiates the tunnel, phase 1 completes. But if the Watchguard side tries to bring up the tunnel, phase 2 fails and neither side can ping the other. The errors on the 3030 are "All IPSec SA proposals found unacceptable!" and "QM FSM error". If we send traffic to bring up the tunnel, we get the same errors, but also get a phase 2 complete and we're able to successfully ping a device on the customer's network. Have verified phase 2 settings are the same. Firebox uses 3DES-CBC for Auth, only difference I can see.
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...