ZyXEL Communications zywall 50 User Manual

ZyWALL 50  Internet Security Gateway 

23-4  

VPN/IPSec 

Setup 

My IP Addr is the (initiator) ZyWALL WAN IP address. If this field is configured as 0.0.0.0, then the 
ZyWALL will use the current ZyWALL WAN IP address (static or dynamic) to set up the VPN tunnel. If the 
My IP Addr changes after setup, then the VPN tunnel will have to be rebuilt again. 
Secure Gateway IP Address is the WAN IP address of the remote IPSec router. Normally it is a static 
public IP address (for traffic going through the Internet) but if the peer has a dynamic WAN IP address, set 
this field to 0.0.0.0. This may be useful for telecommuters initiating a VPN tunnel to headquarters where 
headquarters do not know the WAN IP address of the telecommuter’s device. Only the telecommuter may 
initiate the VPN tunnel in this case. See the following table for an example configuration. 
 

My IP 
address:  

0.0.0.0 (dynamic IP address 
assigned by the ISP) 

Public static IP address 

Secure 
Gateway IP 
Address:  

Public static IP address. 

0.0.0.0  

With this IP address only the 
telecommuter can initiate the IPSec 
tunnel.