Selecting a Deployment Scenario

The deployment scenarios described in this section are based on actual customer deployments and are SonicWALL- recommended deployment best practices for SRA appliances .

A SonicWALL SRA appliance is commonly deployed in “one- arm” mode over the DMZ or Opt interface on an accompanying gateway appliance, such as a SonicWALL NSA E7500. This method of deployment offers additional layers of security control, plus the ability to use SonicWALL’s UTM services, including Gateway Anti-Virus, Anti-Spyware, Content Filtering, Intrusion Prevention Service, and Comprehensive Anti-Spam Service, to scan all incoming and outgoing NetExtender traffic.

The primary interface (X0) on the SonicWALL SRA connects to an available segment on the gateway device. The encrypted user session is passed through the gateway to the SonicWALL SRA appliance. The SonicWALL SRA appliance decrypts the session and determines the requested resource.

The session traffic then traverses the gateway appliance to reach the internal network resources. The gateway appliance applies security services, such as Intrusion Prevention, Gateway Anti-Virus, and Anti-Spyware inspection as data traverses the gateway. The internal network resource then returns the requested content to the SonicWALL SRA appliance through the gateway, where it is encrypted and sent to the client.

Scenario Overviews

Scenario A: SRA on a New DMZ

 

SonicWALL UTM Appliance

 

X1

E7500

 

 

X0

 

OPT, X2, etc

 

 

Router

 

Switch

Remote Users

X0

Network Nodes

 

 

SRA 1200

SRA Appliance

WAN

DMZ

LAN

SonicWALL SRA 1200/4200 Getting Started Guide Page 7

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SonicWALL SRA 1200/4200 manual Selecting a Deployment Scenario, Scenario Overviews