Private Application access through Prisma Browser and Explicit proxy is failing with error ERR_TUNNEL_CONNECTION_FAILED
1155
Created On 11/04/25 23:12 PM - Last Modified 12/10/25 02:45 AM
Symptom
- Access to internal resources down via Prisma Browser and Explicit Proxy.
- Access to public sites remains functional.
- Private application not accessible initially via FQDN.
- The same App is accessible through Prisma Access Browser /Explicit Proxy when using IP address.
- The browser will present ERR_TUNNEL_CONNECTION_FAILED error
Environment
- Prisma Browser
- Prisma Access Explicit Proxy
- Private App Access through Prisma Access Explicit Proxy
- Private App Access through Prisma Access Browser
- Authentication Bypass domain list
Cause
- The private app domain was incorrectly configured under the Authentication bypass domain list for the Explicit Proxy.
- The private app domains should not be included in the authentication bypass domain list, which caused a failure in private resource access.
Resolution
Ensure that private app domains are not configured under the authentication bypass domain list for Explicit Proxy.
Additional Information
N/A