October 2020
Intermediate to advanced
481 pages
17h 35m
English
Content preview from Network Security, Firewalls, and VPNs, 3rd Edition
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Tunnel Versus Transport Mode
VPNs can use two main types of encapsulation encryption. These are known as tunnel-mode and transport-mode encryption.
Tunnel-mode encryption protects the entire original IP packet’s header and payload. The encrypted packet becomes the payload of a new IP packet with a new IP header. This form of encryption ensures that the identities of the original endpoints of the communication are kept confidential while the traffic traverses the secured link. Tunnel-mode encryption is commonly used by VPNs linking network sites together or providing secure remote access.
Transport-mode encryption protects only the original IP packet’s payload. The encrypted payload retains its original IP header. This form of encryption protects ...
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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.