Prestige 334 User’s Guide

Figure 180 Menu 27.1.1.1 IKE Setup

Menu 27.1.1.1 - IKE Setup

Phase 1

Negotiation Mode= Main

Pre-Shared Key= ?

Encryption Algorithm= DES

Authentication Algorithm= MD5

SA Life Time (Seconds)= 28800

Key Group= DH1

Phase 2

Active Protocol= ESP

Encryption Algorithm= DES

Authentication Algorithm= SHA1

SA Life Time (Seconds)= 28800

Encapsulation= Tunnel

Perfect Forward Secrecy (PFS)= None

Press ENTER to Confirm or ESC to Cancel:

Press Space Bar to Toggle.

The following table describes the fields in this menu.

Table 106 Menu 27.1.1.1 IKE Setup

FIELD

DESCRIPTION

 

 

Phase 1

 

Negotiation

Press [SPACE BAR] to choose from Main or Aggressive and then press [ENTER].

Mode

See earlier for a discussion of these modes. Multiple SAs connecting through a

 

secure gateway must have the same negotiation mode.

PSK

Prestige gateways authenticate an IKE VPN session by matching pre-shared keys.

 

Pre-shared keys are best for small networks with fewer than ten nodes. Enter your

 

pre-shared key here. Enter up to 31 characters. Any character may be used, includ-

 

ing spaces, but trailing spaces are truncated.

 

Both ends of the VPN tunnel must use the same pre-shared key. You will receive a

 

“PYLD_MALFORMED” (payload malformed) packet if the same pre-shared key is

 

not used on both ends.

Encryption

When DES is used for data communications, both sender and receiver must know

Algorithm

the same secret key, which can be used to encrypt and decrypt the message or to

 

generate and verify a message authentication code. Prestige DES encryption algo-

 

rithm uses a 56-bit key.

 

Triple DES (3DES), is a variation on DES that uses a 168-bit key. As a result, 3DES

 

is more secure than DES. It also requires more processing power, resulting in

 

slightly increased latency and decreased throughput.

 

Press [SPACE BAR] to choose from 3DES or DES and then press [ENTER].

Chapter 34 VPN/IPSec Setup

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