Hi. Can anyone help me? I have to set up a VPN for a 4-site company. ADSL (Ethernet presentation) has been installed and is testing fine for each site's local web access, etc.
Are there any examples of configs for a network that has 831 Routers running the VPN between the sites, providing tunnelling, encryption, firewalling, and still allowing web access from each site? Any help, pointers, etc, will be gratefully received.
When configuring router-to-router IPSec, you need to define exactly what traffic will be encrypted and tunneled across. This is defined using access lists that are then linked to the crypto maps. Traffic that matches that access list is tunneled across to the remote end while the rest of the traffic that is routed to the interface (but desen't match the access list) is passed through unencrypted.
The IPSec support page is an excellent reference for configuration examples. You can reach the same by cisco.com > technical support > technology support > security and vpn > ipsec.
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...