I have an ASA 5520 that I have used for several years as my vpn endpoint for remote users and site to site. Using cisco vpn client on remote users, I can ping my dns servers by ip and name, I can ping certain server names by ip and by name but not all. For instance. I have forwarding zones on my dns server: companya.com, companyb.com, companyc.com from my remote user I can ping server.companya.com and server.companyb.com but can not ping server.companyc.com (however I can ping server.companyc.com by ip address) so it has to be a dns issue somewhere. Any suggestions? thank you in advance
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...