ZyXEL 202H 91-003-194001B User Manual

P-202H Plus v2 User’s Guide

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Chapter 11 VPN Screens

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My IP Address is the WAN IP address of the ZyXEL Device. If this field is configured as 
0.0.0.0, then the ZyXEL Device will use the current ZyXEL Device WAN IP address (static or 
dynamic) to set up the VPN tunnel. The ZyXEL Device has to rebuild the VPN tunnel if the 
My IP Address changes after setup. 

Secure Gateway IP 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 Secure Gateway IP 
Address field. You may alternatively enter the remote secure gateway’s domain name (if it 
has one) in the Secure Gateway IP Address field. 

Table 32   AH and ESP

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. 

Select NULL to set up a phase 2 tunnel 

without encryption.

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.