#Tech Tips# 5 Reasons Why a Sangfor NGAF Firewall Policy May Not Work as Expected

Creating a firewall policy is straightforward, but sometimes traffic may not work as expected even when the policy appears to be correctly configured.

Here are 5 quick checks that can help troubleshoot an NGAF firewall policy:

1. Check Policy Order / Priority
Make sure another policy above it is not matching the same traffic first.

2. Verify Source & Destination Objects
Check the source IP, destination IP, subnet, and address objects carefully. Even a small mismatch can prevent the expected policy from matching.

3. Check Service & Port Configuration
Verify that the required TCP/UDP ports are included in the policy. Some applications may also require additional ports.

4. Verify NAT Configuration
For Internet-bound traffic, confirm that the required SNAT/NAT configuration is correctly applied.

5. Check Traffic Logs
Traffic logs are one of the fastest ways to troubleshoot. They can help determine whether traffic was allowed, denied, or matched by a different policy.

Quick Tip:
Before changing multiple settings, first identify which firewall policy is actually processing the traffic. This can significantly reduce troubleshooting time.

Question for the community:
What is the most common NGAF firewall policy issue you have encountered in your environment?

Share your experience and troubleshooting tips in the comments.

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