I have to configure the ASA phone proxy in my network but I need to put the ASA 5510 in the DMZ network the ip of fttp and MTA would be needed perform nat in the firewwall because de Dmz network have not ips routeables at the internet
my cuestion is how it work, I need perform NAT in the ASA for real ip of TFTP
I wish I had good new for you, but a NAT router/firewall in front of a Phone Proxy enabled ASA is not supported. Phone Proxy requires publicly routable addresses for both signaling and media termination. THe implementation you are trying to setup will not work.
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...