Avaya Configuring Integrated IP Security Manuel d'utilisateur Page 25

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304111-A Rev 00
2-1
Chapter 2
Getting Started with IPsec
IPsec has three key constructs:
Security gateways
Security policies
Security associations (SAs)
In the IPsec context, hosts communicate across an untrusted network through
security gateways (routers configured for IPsec interfaces). Security policies
determine how the IPsec interfaces handle data packets for the hosts on both ends
of a connection. Security associations apply IPsec services to data packets
traveling between the security gateways.
Figure 2-1
shows the logical relationship between security policies and security
associations.
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