ZyXEL Communications ZyWALL 10/10, User Manual

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ZyWALL 10/10 II/50 Internet Security Gateway
26-4 VPN/IPSec Setup
26.3.1 My IP Address
My IP Addr is the WAN IP address of the ZyWALL. 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. The ZyWALL
has to rebuild the VPN tunnel if the
My IP Addr changes after setup.
26.3.2 Secure Gateway Address
Secure Gateway Addr 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 Addr field. You
may alternatively enter the remote secure gateway’s domain name (if it has one) in the Secure Gateway
Addr field.
You can also enter a remote secure gateway’s domain name in the
Secure Gateway Addr 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).
If the remote secure gateway has a dynamic WAN IP address and does not use DDNS, enter 0.0.0.0 in the
Secure Gateway Addr field. 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. See the following table for an
example configuration.
You can configure multiple SAs to simultaneously connect through the same secure gateway. In this case,
you must configure the SAs to have the same
Negotiation Mode and Pre-Shared Key ( Menu 27.1.1.1 IKE
Setup ).
Table 26-2 Telecommuter and Headquarters Configuration Example
TELECOMMUTER HEADQUARTERS
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 or
domain name. 0.0.0.0
With this IP address only the
telecommuter can initiate the IPSec
tunnel.