ZyXEL Communications ZyWALL 110 Series, User Manual, Page: 288 / 562

Chapter 20 IPSec VPN
ZyWALL 110/310/1100 Series User’s Guide
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Each field is described in the following table.
Table 107
Configuration > VPN > IPSec VPN > VPN Connection > Edit
LABEL DESCRIPTION
Show Advanced
Settings / Hide
Advanced Settings Click this button to display a greater or lesser number of configuration fields.
Create new Object Use to configure any new settings objects that you need to use in this screen.
General Settings
Enable Select this check box to activate this VPN connection.
Connection Name Type the name used to identify this IPSec SA. You may use 1-31 alphanumeric
characters, underscores(
_
), or dashes (-), but the first character cannot be a
number. This value is case-sensitive.
Nailed-Up Select this if you want the ZyWALL to automatically renegotiate the IPSec SA when
the SA life time expires.
Enable Replay
Detection
Select this check box to detect and reject old or duplicate packets to protect against
Denial-of-Service attacks.
Enable NetBIOS
Broadcast over
IPSec
Select this check box if you the ZyWALL to send NetBIOS (Network Basic Input/
Output System) packets through the IPSec SA.
NetBIOS packets are TCP or UDP packets that enable a computer to connect to and
communicate with a LAN. It may sometimes be necessary to allow NetBIOS packets
to pass through IPSec SAs in order to allow local computers to find computers on the
remote network and vice versa.
MSS Adjustment Select Custom Size to set a specific number of bytes for the Maximum Segment Size
(MSS) meaning the largest amount of data in a single TCP segment or IP datagram
for this VPN connection.
Select Auto to have the ZyWALL automatically set the MSS for this VPN connection.
VPN Gateway
Application
Scenario
Select the scenario that best describes your intended VPN connection.
Site-to-site - Choose this if the remote IPSec router has a static IP address or a
domain name. This ZyWALL can initiate the VPN tunnel.
Site-to-site with Dynamic Peer - Choose this if the remote IPSec router has a
dynamic IP address. Only the remote IPSec router can initiate the VPN tunnel.
Remote Access (Server Role) - Choose this to allow incoming connections from
IPSec VPN clients. The clients have dynamic IP addresses and are also known as dial-
in users. Only the clients can initiate the VPN tunnel.
Remote Access (Client Role) - Choose this to connect to an IPSec server. This
ZyWALL is the client (dial-in user) and can initiate the VPN tunnel.
VPN Gateway Select the VPN gateway this VPN connection is to use or select Create Object to add
another VPN gateway for this VPN connection to use.
Manual Key Select this option to configure a VPN connection policy that uses a manual key
instead of IKE key management. This may be useful if you have problems with IKE
key management. See
Section 20.2.2 on page 292 for how to configure the manual
key fields.
Note: Only use manual key as a temporary solution, because it is not as secure as a
regular IPSec SA.
Policy
Local Policy Select the address corresponding to the local network. Use Create new Object if
you need to configure a new one.