Ipsec; Security Association; My Ip Address; Secure Gateway Address - ZyXEL Communications ZyWall P1 User Manual

3.3.1 IPSec

Internet Protocol Security (IPSec) is a standards-based VPN that offers flexible solutions for
secure data communications across a public network like the Internet. IPSec is built around a
number of standardized cryptographic techniques to provide confidentiality, data integrity and
authentication at the IP layer.

3.3.2 Security Association

A Security Association (SA) is a contract between two parties indicating what security
parameters, such as keys and algorithms they will use.

3.3.3 My IP Address

My IP Address identifies the WAN IP address of the ZyWALL. You can enter the
ZyWALL's static WAN IP address (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 IP Address changes after setup.

3.3.4 Secure Gateway Address

Secure 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 Secure Gateway
Address field. You may alternatively enter the remote secure gateway's domain name (if it
has one) in the Secure Gateway Address field.
You can also enter a remote secure gateway's domain name in the Secure Gateway Address
field if the remote secure gateway has a dynamic WAN IP address and is using DDNS. The
ZyWALL has to rebuild the VPN tunnel each time the remote secure gateway's WAN IP
address changes (there may be a delay until the DDNS servers are updated with the remote
gateway's new WAN IP address).

3.3.4.1 Dynamic Secure Gateway Address

If the remote secure gateway has a dynamic WAN IP address and does not use DDNS, enter
0.0.0.0 as the secure gateway's address. In this case only the remote secure gateway can
initiate SAs. This may be useful for telecommuters initiating a VPN tunnel to the company
network.

3.3.5 VPN Wizard: Gateway Policy Setting

Click VPN Wizard in the HOME screen to open the screen as shown and have the quick and
initial VPN configuration.
Configure the first VPN wizard screen to configure the settings between the ZyWALL and the
remote VPN router.
Chapter 3 Wizard Setup
ZyWALL P1 User's Guide
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