1) Since it is PPPoE try changing the MTU size. Try 1000 first but you might need to play around with it
2) Change the NIC card. I have seen this behavior with a NIC card that was having problems. The system could connect fince but VPN, file sharing, etc would not work. Since you changed providers I would look at the hardware first but did the service actually change or just who you paid the bill to? Proider B could just be reslling Provider A's service
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...
[toc:faq]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 and UDP are I...