April 2004
Intermediate to advanced
864 pages
20h 58m
English
Content preview from CCSP Self-Study: Securing Cisco IOS Networks (SECUR)Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Using NAT with IPSec
NAT poses a special problem for IPSec. NAT was developed to forestall the move to IPv6 as IPv4 IP addresses were on the verge of being completely assigned. A NAT border device, such as a firewall or router, translates an internal network IP address into a public network IP address. This device saves addresses because businesses can now assign their own IP address series to internal hosts and permit only those that require a public network to reach the Internet through NAT.
NAT provides a one-to-one address translation. A single internal address gets translated into a single public address. With the rise in the use of web browsers and the availability of information on the web, NAT conversion quickly presented the problem ...
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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.