Siemens 5930, 5935 manual IKE Proposals Definition

SIEMENS 5930/5935 Business Gateway	Chapter 6 Security Setup
User’s Guide	IKE/IPSec Configuration

IKE Proposals Definition

IKE I proposals specify how packets will be encrypted/authenticated for Phase I. To define a new IKE proposal:

1.Click Create next to IKE Proposals from the Advanced IKE/IPSec Setup page. This displays the IKE Proposal Definition page.

2.In IKE Proposal Name, enter a logical name for the IKE Proposal Definition. This name is of no importance to the remote IKE peer.

3.From the Message Authentication Scheme drop-down menu, select one of the following hashing (authentication) options to use to validate IKE Phase I exchange:

•MD5: Performs message authentication using Message Digest 5.

•SHA1: Performs message authentication using Secure Hashing Algorithm 1 (default).

4.From the Diffie-Hellman (Oakley) Group drop-down menu, select one of the following Diffie-Hellman key generation groups to use during IKE Phase I exchange:

•Group 1: Uses Diffie-Hellman Group 1 (768 bits).

•Group 2: Uses Diffie-Hellman Group 2 (1024 bits).

5.From the Encryption Type drop-down menu, select one of the following encryption types to use during IKE Phase II (Quick Mode) exchange:

•DES: Encrypts using a 56-bit key.

•3DES: Encrypts using three 56-bit keys to produce 168-bit encryption.

6.In Phase I Proposal Lifetime, enter the number of seconds after which the Phase I negotiation expires. The default is 1800 seconds. Once this time is elapsed, the system will renegotiate the IKE connection.

7.Click Apply.

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