Why wouldn't it be? If you have an ipsec tunnel, there is nothing stopping you from adding an mroute across that 'link' technically. It would most likely be a lot of overhead on the device in general depending on what your are multicasting across (i.e. video, data, market feeds, etc...)
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...