Error pages appear when a user violates ETP policy. For example, when a user attempts to access content that is blocked by the Acceptable Use Policy (AUP) or attempts to access a blocked domain or IP address. An error page warns users that website access is prohibited and a violation occurred.
You can change the appearance of the error pages. For a complete list of settings that you can modify, see Error page customization.
Error pages appear in the language that is associated with the end-user’s browser. These pages are translated by the browser.
- Website Access Prohibited
- Threat Website Warning
- Acceptable User Policy Violation
- Error Page Warning
- User Authentication Error
Website Access Prohibited
- When a user from an Unidentified IPs location attempts to access a domain that may be a security risk. These users are typically remote users who access content from IP addresses that are not already configured as locations in ETP.
- When ETP proxy is disabled and malicious HTTP or HTTPS traffic is directed to Enterprise Security Connector version 2.5.0.
Threat Website Warning
- Phishing Website Warning. Appears when a user attempts to access a domain that is known or suspected to perform phishing attacks.
- Malware Website Warning. Appears when a user attempts to access a domain that is known to host malware.
- C&C Website Warning. Appears when a user attempts to access a domain that is known to perform command and control communications.
Acceptable User Policy (AUP) or Application Visibility and Control (AVC) Violation
This message appears when a user violates the acceptable use policy (AUP) or application visibility and control (AVC) settings in a policy. The message indicates which AUP or AVC category was violated.
Error Page Warning
- Connectivity issue to the origin website.
- TLS certificate issue. This includes cases where ETP Proxy cannot validate an origin certificate. If an ETP administrator chooses to block origin certificates that cannot be verified, this error page appears to the user.
- Unknown user or group attempting to access a website.