You can enable or disable URL Dynamic Analysis by using the Email Security - Server appliance Web UI or CLI:
When you enable URL Dynamic Analysis (also called DUA), the Email Security - Server appliance can analyze both the URL and the objects the URL references. The Email Security - Server appliance can also identify malicious shortened URLs (for example, j.mp, tinyurl.com, or bit.ly) that are embedded in an email message body. The Email Security - Server appliance will not analyze a URL within an email message body for malicious content if it contains a domain that you added to a whitelist. For details about how to add domains to a custom whitelist for URL Dynamic Analysis, see Adding or deleting a custom domain whitelist for URL dynamic analysis using the CLI. URL Dynamic Analysis is disabled by default.
Important
Do not enable URL Dynamic Analysis until you have validated end-to-end connectivity between live ether1 or ether2 interface and the Internet.
Prerequisites
Administrator or Operator access to the Email Security - Server appliance.
An established connection between the Email Security - Server appliance and the Internet.
Verify that the live ether1 or ether2 data interface is configured and tested for connectivity to the Internet directly or through an HTTP proxy server. For details about how to configure connectivity settings for the live (ether1 or ether2) interface and to test the connectivity, see Configuring URL dynamic analysis using the Web UI or Configuring URL dynamic analysis using the CLI
If a proxy server is configured, verify and test the connection between the proxy server and the Internet. For details about how to verify and test the connection between the proxy server and the Internet, see Configuring a proxy server for URL dynamic analysis using the Web UI or Configuring a proxy server for URL dynamic analysis using the CLI.