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2. IPSec VPN
2.1 General principles
IPSec (IP Security) is a set of protocols specifying essentially two aspects:
encapsulation of IP datagrams in other IP datagrams to provide classic security services: integrity, confidentiality, authentication, etc;
negotiation of the keys and security associations used during encapsulation.
As IPSec encapsulation is based on IP datagrams (layer 3 of the OSI model), all applications can benefit from the...
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IPSec VPN
VPNs based on other tunneling technologies
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