Figure 6-43: Global Nat Traversal Advanced Settings - Linksys WRV200 User Manual

Wireless-G VPN Router with RangeBooster
If IKE failed more than _times, block this unauthorized IP for _ seconds. This feature is enabled by default.
It enables the Router to block unauthorized IP addresses. Specify the number of times IKE must fail before the
Router blocks that unauthorized IP address.
IPComp Compression. You can click the IPComp Compression checkbox to enable IP compression to be done
before encryption.
Anti-replay. This protects the Router from anti-replay attacks, when people try to capture your authentication
packets in an attempt to gain access. The feature is enabled by default.
Global Options
Global NAT-Traversal. This feature is enabled by default. You can select Global NAT-Traversal to support the
remote peers behind NAT workaround for all IPSec tunnels. NAT-Traversal is a technology that is developed for
the IPSec peer behind NAT to ward off error identification of IKE phase and ESP packet fallacious authentication,
such two error situation are caused by regular NAT IP translation. NAT-Traversal will help to establish IPSec
Tunnels and encapsulate the original ESP packet with a UDP header and a trailer. Such UDP packet will be
regularly translated private/public IP and port number by NAT, but the internal encapsulated ESP packet can keep
the original integrity and secrecy for remote IPSec peer verification. You can indicate certain accepted private
networks, click Advanced Setting.
Select Enabled to enable Global NAT-Traversal support, and Disabled will disable it.
Global NAT-Traversal Advanced Settings
Allowable Remote Private Networks. You can select Allow All to allow the peer to sit in any private network
that is behind a NAT, or By Manual Setting to indicate designated private networks manually.
Manual Setting. Enter the IP Address and Mask of what you want to accept that remote peer sat behind NAT.
Click the Checkbox and Save Setting to save and enable your new configuration.
When you have finished making changes to the screen, click the Save Settings button to save the changes, or
click the Cancel Changes button to undo your changes. For help information, click More.
Chapter 6: Configuring the Wireless-G VPN Router
The VPN Tab - IPSec VPN

Figure 6-43: Global NAT Traversal Advanced Settings

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