Multiple Unified Access Gateway Appliances for Scale and High Availability

For simplicity, this document has described a deployment with just a single Unified Access Gateway appliance in DMZ 1 and DMZ 2. In production environments designed for scale and high availability it is recommended that multiple Unified Access Gateway appliances are deployed with load balancing.

The configuration of each Web Reverse Proxy Unified Access Gateway in DMZ 1 is the same except that it will reference the specific IP address for its corresponding Unified Access Gateway appliance in DMZ 2.

Figure 1. Multiple Unified Access Gateway appliances deployed in a double DMZ

Figure 6-1 shows an example deployment of multiple Unified Access Gateway appliances with load balancing performed in DMZ 1.