Firewall blocks business application

Identify required destination and ports, then add the narrowest approved rule.

How to troubleshoot

1. Confirm the business impact, affected users, and any recent network or policy changes.
2. Identify required destination and ports, then add the narrowest approved rule.
3. Document the change and validate with an affected user before closing the incident.

When to get professional assistance

If these steps do not resolve the issue, or you suspect failing hardware, data loss, a security incident, or a production-system problem, consider qualified technical support. Back up important data where possible and obtain authorization before changing business systems.

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