Watchguard Firebox X15 User Manual page 144

Proxy Settings
Configure the HTTP proxy policy deny message
1. To connect to the System Status page, type
of the Firebox X Edge trusted interface.
The default URL is: https://192.168.111.1
2. From the navigation bar, select Firewall > Outgoing.
The Filter Outgoing Traffic page appears
3. Under Common Proxy Policies, click the Edit button adjacent to the HTTP-Proxy entry.
4. Select the HTTP Settings tab.
5. Type the deny message in the Deny Message text box.
6. Click Submit to save your changes.
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in the browser address bar, and the IP address
https://
.
Firebox X Edge e-Series