Sidewinder G2 6.1.1 Administration Guide - Glossary of Technical ...

Understanding virtual burbs
You can define up to 24 physical and virtual burbs. For example, if
you have two distinct types of VPN associations and you want to
apply a different set of rules to each type, create two virtual burbs,
then configure the required proxies and rules for each virtual burb.
One question that might come to mind when using a virtual burb is:
"How does VPN traffic get to the virtual burb if it doesn’t have a
network card?" All VPN traffic originating from the Internet initially
arrives via the network interface card in the Internet burb. A VPN
security association, however, can internally route and logically
terminate VPN traffic in any burb on the Sidewinder G2. By defining a
security association to terminate the VPN in a virtual burb, the VPN
traffic is automatically routed to that virtual burb within the
Sidewinder G2. Thus, the trusted network now recognizes the virtual
burb as the source burb for your VPN traffic. From the virtual burb, a
proxy and rule are needed to move the traffic to a trusted burb with
network access.
Creating and using a virtual burb with a VPN
This section explains how to create a virtual burb on the Sidewinder
G2 and how to use it in a VPN association.
Create the virtual burb 1. In the Admin Console, select Firewall Administration -> Burb
Configuration.
2. Click New.
a. In the Burb Name field, type the name for your virtual burb.
b. Click OK.
3. Click the Save icon.
Configure proxies and rules 4. In the Admin Console, select Services Configuration -> Proxies and
enable the desired proxies in the virtual burb.
Configuring Virtual Private Networks 13-17