Ipsec Sa Overview; Local And Remote Networks - ZyXEL Communications ZYWALL 35 User Manual

Chapter 18 IPSec VPN
Table 102 SECURITY > VPN > VPN Rules (IKE) > Edit Gateway Policy (continued)
LABEL
Associated
Network Policies
#
Name
Local Network
Remote Network
Edit
Delete
Apply
Cancel

18.6 IPSec SA Overview

Once the ZyWALL and remote IPSec router have established the IKE SA, they can securely
negotiate an IPSec SA through which to send data between computers on the networks.
The IPSec SA stays connected even if the underlying IKE SA is not available
anymore.
This section introduces the key components of an IPSec SA.

18.6.1 Local and Remote Networks

In an IPSec SA, the local network consists of devices connected to the ZyWALL and may be
called the local policy. Similarly, the remote network consists of the devices connected to the
remote IPSec router and may be called the remote policy.
You can configure a remote network as 0.0.0.0 (any) when:
• Forwarding all outgoing traffic to the remote gateway.
• The remote network's addresses are unknown or there are many remote networks using
one VPN rule (see
one VPN rule).
368
DESCRIPTION
The following table shows the policy(ies) you configure for this rule.
To add a VPN policy, click the add network policy (
(IKE) screen (see Figure 204 on page
for more information.
This field displays the policy index number.
This field displays the policy name.
This field displays one or a range of IP address(es) of the computer(s) behind the
ZyWALL.
This field displays one or a range of IP address(es) of the remote network behind
the remote IPsec router.
Click this icon to open the screen where you can configure the network policy.
Click this icon to remove the network policy.
Click Apply to save your changes back to the ZyWALL.
Click Cancel to exit this screen without saving.
Section 18.15.1 on page 389
) icon in the VPN Rules
354). Refer to Section 18.7 on page 372
for an example of telecommuters sharing
ZyWALL 5/35/70 Series User's Guide