Can someone explain why incoming SIP Registrations through an ASA are allowed even though SIP is denied. I see that the Global Inspection inludes the following so I presume this is the reason. Also, how can I block registrations, but allow any SIP calls initiated from the inside still go through.
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...