Troubleshooting Tip: WAF blocks a file download and shows Error Event:60140003

[sahmed_FTNT]

Description	This article describes how to resolve cases where a WAF(Web Application Firewall) blocks file downloads and provides the error code 60140003.
Scope	FortiGate.
Solution	First, verify the signature details using the following command: diagnose waf dump | grep '90300017' #90300017 - This signature prevents attackers from obtaining file and folder names using a tilde character "~"   Use one of the following solutions to pass the traffic: Solution 1: Set the action to Monitor for Generic Attacks in the WAF profile to pass the traffic through. Solution 2: Use a Custom signature to allow specific traffic. Refer to this document for instructions.