Palo Alto Networks Firewall Blocking Harness Connections

Incident Report for Harness

Investigating

We are currently investigating connectivity issues affecting customers whose environments are protected by Palo Alto Networks firewalls. These firewalls are blocking connections to Harness APIs, which may result in:

- Failed pipeline executions
- Inability to deploy applications
- Intermittent timeouts when accessing Harness platform features
- Integration failures with third-party tools
- Delegate connectivity with Harness platform

This issue is not caused by a Harness service outage, but rather by firewall rules on your network side. We are advising customers to make an exception for our DNS endpoints.

Posted Sep 23, 2026 - 13:17 PDT

This incident affects: Prod 8 (Platform), Prod 5 (Platform), Prod 7 (Platform), Prod 4 (Platform), Prod Eu 1 (Platform), Prod 1 (Platform), Prod 3 (Platform), Prod 2 (Platform), and Prod 6 (Platform).