Assuming there is no problem with the ADSL connection itself, have you tried generating traffic continuously between this site and your central site? It may be that the ADSL is dropping because there is no traffic over the connection for a period of time. Usually this does not cause a problem at the ADSL site because the ADSL comes up as soon as traffic is generated by someone at that site. If you are trying to reach the ADSL site from a central site you may find that it is unreachable until someone initiates some traffic from the ADSL site.
If you have an application that periodically generates traffic from the ADSL site it may be enough to keep this connection active all the time.
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...