I'm writing hoping that you can shine some light into a design question that I have regarding a small office WAN connectivity, I would like to load balance between 2 different ISP (Cable and DSL) both with static IPs using ISR 1841 and a ASA 5505 with security plus license. This site is not hosting any service so I'm not concern with inbound traffic as I am with the outbound. My concerns are.
1. I would like to perform NAT and security function at the ASA1, how should my connectivity be between ASA1 and ISR1?
2. What is the recommended approach for a dual ISP load sharing scenario in a case like this?
1) I would use the ASA as the Firewall but the IOS Router as the NAT device so it can perform both the NAT and the PBR Required.
2) Having a Cisco IOS router best scenario is do whatever fits you the best Send HTTP and HTTPS traffic over one link and then VoIP and Video over another link,etc,etc (This is just an example of course) but with an IOS router you have a lot of options to play with)
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...