I want to establish a GRE Tunnel between our center office and branch office through Internet. But just center office have some internet IP address.Our branch office dialer up Internet by ISDN or ADSL. And they get dynamic IP address form ISP. So I can not set another side IP address on router config. Who can help me work out the problem?
I have finished to establish IPSec Tunnel between center and branch office. But I just use access-list to control IPsec Tunnel building. I can not do any way to eshtablish GRE Tunnel in the situation. Can you give me a example like it?
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...