|Understanding VPN IPSec Tunnel Mode and IPSec Transport Mode -
What's the Difference?| |Written by Administrator| |Sunday, 06
May 2012 04:14| IPSec’s protocol objective is to provide
security services for IP packets such as encrypting sensitive
data, authentication, protection against replay and data
confidentiality. As outlined in our IPSec protocol article,
Encapsulating Security Payload (ESP) and Authentication Header
(AH) are the two IPSec security protocols used to provide these
security services. Analysing the ESP and AH protocols is out of
this article’s scope, however you can turn to our IPSec article
where you’ll find an in-depth analysis and packet diagrams to
help make the concept clear. Understanding IPSec Modes –Tunnel
Mode & Transport Mode IPSec can be configured to operate in two
different modes, Tunnel and Transport mode. Use of each mode
depends on the requirements and implementation of IPSec. IPSec
Tunnel Mode IPSec tunnel mode is the default mode. With tunnel
mode, the entire original IP p