Variations in DNS query handling across different deployment types on EdgeSWG (ProxySG).

Products

• Advanced Secure Gateway Software - ASG
• ProxySG Software - SGOS

Issue/Introduction

The purpose of this article is to describe how the DNS process takes place in Explicit, Transparent and Reverse proxy deployments.

Resolution

 

• Explicit Proxy Deployment: The proxy first receives the client request, then resolves the domain name using its own DNS servers before sending the request outward.

• Transparent Proxy Deployment: Clients perform DNS lookups using their configured DNS servers to resolve domain names into IP addresses before forwarding requests to the proxy.

• Reverse Proxy Deployment: DNS resolution occurs in specific cases, as outlined in the article on DNS lookups for reverse proxy configurations.