ZyXEL P-2602HW 사용자 설명서

Chapter 18 VPN Screens

P-2602H(W)(L)-DxA User’s Guide

There are two phases to every IKE (Internet Key Exchange) negotiation – phase 1 
(Authentication) and phase 2 (Key Exchange). A phase 1 exchange establishes an IKE SA and 
the second one uses that SA to negotiate SAs for IPSec.

Figure 144   Two Phases to Set Up the IPSec SA

In phase 1 you must:

• Choose a negotiation mode.
• Authenticate the connection by entering a pre-shared key.
• Choose an encryption algorithm.
• Choose an authentication algorithm.
• Choose a Diffie-Hellman public-key cryptography key group (DH1 or DH2).
• Set the IKE SA lifetime. This field allows you to determine how long an IKE SA should 

stay up before it times out. An IKE SA times out when the IKE SA lifetime period expires. 
If an IKE SA times out when an IPSec SA is already established, the IPSec SA stays 
connected.

In phase 2 you must:

• Choose which protocol to use (ESP or AH) for the IKE key exchange.
• Choose an encryption algorithm.
• Choose an authentication algorithm
• Choose whether to enable Perfect Forward Secrecy (PFS) using Diffie-Hellman public-

key cryptography – see 

. Select None (the default) to disable 

PFS.

• Choose Tunnel mode or Transport mode.

Cancel

Click Cancel to begin configuring this screen afresh.

Advanced Setup

Click Advanced Setup to configure more detailed settings of your IKE key 

management.

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