you mentioned "dynamic ip", just wondering if you are referring to the pix will negotiate the public ip from the isp after a certain time period. assuming the public ip keeps changing, then remote management would not be feasible with pix.
if it is a router, configuring "dynamic dns" will resolve this issue. unfortunately, i don't think pix support ddns yet.
You may use a Dynamic DNS service, generaly this service is free. This service updates all IP changes to the hostname and whenever the IP changes the DNS name change too !
This is the No-IP.com Dynamic DNS update client page. We offer these clients for you to download free of charge. The clients are available for Linux/Unix, MacOS, and Windows.
When configured correctly, the client will check your IP address at a given time interval checking to see if your IP has changed. If your IP address has changed it will notify our dns servers and update the IP corresponding to your No-IP/No-IP+ hostname.
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...