Introduction Geo-IP restrictions and IP reputation filters can block legitimate traffic, especially from cloud provider IP ranges that may have been flagged for abuse.

Symptoms - HTTP 403 Forbidden from CDN or WAF - Error: "Access denied due to geographic restrictions" - Connection works from some IPs but not others - Cloud provider IP range blocked - VPN users unable to access services

Common Causes - Geo-IP restriction too broad (blocking entire country) - Cloud provider IP ranges on blocklists - IP reputation service false positive - CDN geo-restriction configuration error - WAF rule blocking specific IP ranges

Step-by-Step Fix 1. **Identify the blocking layer': ```bash # Check CDN/WAF logs # Check if IP is on blocklists curl https://api.abuseipdb.com/api/v2/check?ipAddress=<ip> ```

  1. 1.**Whitelist the IP':
  2. 2.Update WAF/CDN configuration to allow the specific IP or range.
  3. 3.**Request IP reputation removal':
  4. 4.Contact the reputation service to remove the false positive.

Prevention - Maintain an IP whitelist for known legitimate sources - Use specific geo-restrictions (country-level, not continent) - Monitor block rate for false positives - Document all geo-restriction rules - Test access from all required geographic locations