Bridge NAT Configuration

About this task

Use Bridge NAT to manage Internet traffic originating at a remote site. In addition to traditional NAT functionality, Bridge NAT provides a means of configuring NAT for bridged traffic through an access point. NAT rules are applied to bridged traffic through the access point, and matching packets are NATed to the WAN link instead of being bridged on their way to the router.

Using Bridge NAT, a tunneled VLAN (extended VLAN) is created between the NoC and a remote location. When a remote client needs to access the Internet, Internet traffic is routed to the NoC, and from there routed to the Internet. This increases the access time for the end user on the client.

To resolve latency issues, Bridge NAT identifies and segregates traffic heading towards the NoC and outwards towards the Internet. Traffic towards the NoC is allowed over the secure tunnel. Traffic towards the Internet is switched to a local WLAN link with access to the Internet.

Note

Bridge NAT supports single AP deployments only. This feature cannot be used in a branch deployment with multiple access points.

To define a Bridge NAT configuration that can be applied to a profile:

Procedure

Select Configuration → Devices → System Profile from the web UI.
Expand the Security menu and select Bridge NAT.

Profile Security - Bridge NAT Screen

Review the following Bridge NAT configurations to determine whether a new Bridge NAT configuration requires creation or an existing configuration modified or removed.


Access List	Lists the ACL applying IP address access/deny permission rules to the Bridge NAT configuration.
Interface	Lists the communication medium (outgoing layer 3 interface) between source and destination points. This is either the access point's pppoe1 or wwan1 interface or the VLAN used as the redirection interface between the source and destination.
NAT Pool	Lists the names of existing NAT pools used with the Bridge NAT configuration. This displays only when Overload Type is NAT Pool.
Overload IP	Lists the IP address used globally for numerous local addresses.
Overload Type	Lists the overload type used with the listed IP ACL rule. Set as either NAT Pool, One Global Address or Interface IP Address.
ACL Precedence	Lists the administrator assigned priority set for the ACL. The lower the value listed the higher the priority assigned to these ACL rules.