December 2005
Intermediate to advanced
1032 pages
29h 12m
English
Content preview from The Complete Cisco VPN Configuration Guide
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IPsec Traffic and Networks
There are two important issues you might have to deal with concerning the sending and receiving of IPsec traffic:
Address translation
Firewalls
Other IPsec issues
The following three sections will discuss these issues in more depth.
IPsec and Address Translation
Address translation translates addressing and, possibly, port information inside IP, TCP, or UDP headers. My goal here is to not discuss what address translation is; I’m assuming you are already familiar with it. My other Cisco Press book, Cisco Router Firewall Security, covers the mechanics of address translation on Cisco routers, if you’re not that familiar with the process.
As you already know, there are three IPsec connections between two IPsec peers:
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.