ZyXEL Communications ZyXEL ZyWALL 5 - Manual (Page 223)

ZyWALL 5 User’s Guide
222 Chapter 14 VPN Screens
14.3 My ZyWALL
My ZyWALL identifies the WAN IP address or domain name of the ZyWALL (if it has one)
or leave the field set to 0.0.0.0. The ZyWALL has to rebuild the VPN tunnel if the My
ZyWALL IP address changes after setup.
14.4 Remote Gateway Address
Remote Gateway Address is the WAN IP address or domain name of the remote IPSec router
(secure gateway).
If the remote secure gateway has a static WAN IP address, enter it in the Remote Gateway
Address field. You may alternatively enter the remote secure gateway’s domain name (if it
has one).
Table 62 ESP and AH
ESP AH
Encryption DES (default)
Data Encryption Standard (DES) is a
widely used method of data encryption
using a secret key. DES applies a 56-bit
key to each 64-bit block of data.
3DES
Triple DES (3DES) is a variant of DES,
which iterates three times with three
separate keys (3 x 56 = 168 bits),
effectively doubling the strength of DES.
AES
Advanced Encryption Standard is a
newer method of data encryption that
also uses a secret key. This
implementation of AES applies a 128-bit
key to 128-bit blocks of data. AES is
faster than 3DES.
Select NULL to set up a phase 2 tunnel
without encryption.
Authentication MD5 (default)
MD5 (Message Digest 5) produces a
128-bit digest to authenticate packet
data.
MD5 (default)
MD5 (Message Digest 5) produces a
128-bit digest to authenticate packet
data.
SHA1
SHA1 (Secure Hash Algorithm) produces
a 160-bit digest to authenticate packet
data.
SHA1
SHA1 (Secure Hash Algorithm) produces
a 160-bit digest to authenticate packet
data.
Select MD5 for minimal security and SHA-1 for maximum security.