ZyXEL Communications Prestige 652H/HW Compact Manual page 33

LABEL
Content When you select IP in the Peer ID Type field, type the IP address of the computer with
which you will make the VPN connection or leave the field blank to have the Prestige
automatically use the address in the Secure Gateway IP Address field.
When you select DNS in the Peer ID Type field, type a domain name (up to 31
characters) by which to identify the remote IPSec router.
When you select E-mail in the Peer ID Type field, type an e-mail address (up to 31
characters) by which to identify the remote IPSec router.
The domain name or e-mail address that you use in the Content field is used for
identification purposes only and does not need to be a real domain name or e-mail
address. The domain name also does not have to match the remote router's IP address
or what you configure in the Secure Gateway IP Address field below.
Secure Gateway Type the WAN IP address or the URL (up to 31 characters) of the IPSec router with
IP Address which you're making the VPN connection. Set this field to 0.0.0.0 if the remote IPSec
router has a dynamic WAN IP address (the Key Management field must be set to IKE).
Encapsulation Select Tunnel mode or Transport mode from the drop-down list box.
Mode
VPN Protocol Select ESP if you want to use ESP (Encapsulation Security Payload). The ESP protocol
(RFC 2406) provides encryption as well as some of the services offered by AH. If you
select ESP here, you must select options from the Encryption Algorithm and
Authentication Algorithm fields (described below).
Select AH if you want to use AH (Authentication Header Protocol). The AH protocol
(RFC 2402) was designed for integrity, authentication, sequence integrity (replay
resistance), and non-repudiation but not for confidentiality, for which the ESP was
designed. If you select AH here, you must select options from the Authentication
Algorithm field (described below).
Pre-shared Key Type your pre-shared key in this field. A pre-shared key identifies a communicating
party during a phase 1 IKE negotiation. It is called "pre-shared" because you have to
share it with another party before you can communicate with them over a secure
connection. Multiple SAs connecting through a secure gateway must have the same
pre-shared key.
VPN Setup Select DES, 3DES or NULL from the drop-down list box.
When DES is used for data communications, both sender and receiver must know the
same secret key, which can be used to encrypt and decrypt the message or to generate
and verify a message authentication code. The DES encryption algorithm 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
increased latency and decreased throughput. Select NULL to set up a tunnel without
encryption. When you select NULL, you do not enter an encryption key.
Prestige 652H/HW
Table 10 VPN IKE
DESCRIPTION
32