Whitelist Rules

Whitelist specific WAF rules that cause false positives or block legitimate traffic for your applications. Each rule is identified by a unique Rule ID.

When to Whitelist Rules

Whitelist a rule when:

• Legitimate requests are blocked (false positive)
• Your application requires specific patterns that trigger security rules
• Testing confirms the blocked traffic is safe for your environment
• The rule is too aggressive for your specific use case

Security Impact

Only whitelist rules after confirming the blocked traffic is legitimate. Whitelisting removes protection for that attack pattern.

Find the Rule ID

Before whitelisting, identify the Rule ID that triggered the block:

Method 1: Using Watch Mode (Recommended)

cpgcli waf --watch

Enter a filter pattern (IP, domain, or URI), then recreate the incident. The Rule ID will be displayed.

Method 2: From App Portal

1. Log in to App Portal → Select your server
2. Navigate to Security → WAF Logs
3. Find the blocked request
4. Note the Rule ID from the log entry

Method 3: From Web Server Logs

Check ModSecurity audit logs:

grep "id:" /var/log/modsec_audit.log

Look for the id: field in blocked requests (e.g., id: 4500006).

Add Rule to Whitelist

Once you have the Rule ID, add it to the whitelist.

Using CLI

Add a single rule:

cpgcli waf --whitelist --add 4500006

Add multiple rules at once:

cpgcli waf --whitelist --add 4500006
cpgcli waf --whitelist --add 4500007
cpgcli waf --whitelist --add 4500008

Using App Portal

1. Log in to App Portal → Select your server
2. Navigate to Settings → WAF
3. Scroll to Whitelisted Rules section
4. Enter the Rule ID
5. Click Add to Whitelist

Remove Rule from Whitelist

If you need to re-enable protection, remove the rule from the whitelist.

Using CLI

cpgcli waf --whitelist --remove 4500006

Using App Portal

1. Log in to App Portal → Select your server
2. Navigate to Settings → WAF
3. Find the rule in Whitelisted Rules section
4. Click Remove next to the Rule ID

Apply Changes

Configuration Delay

WAF configuration updates apply after a time delay (usually 1-2 minutes) and are typically followed by a web server restart.

Verify the change:

1. Wait 1-2 minutes after whitelisting
2. Recreate the previously blocked request
3. Confirm the request succeeds
4. Check WAF logs to verify the rule no longer triggers

View Whitelisted Rules

Using CLI

List all whitelisted rules:

cpgcli waf --whitelist --list

Using App Portal

1. Log in to App Portal → Select your server
2. Navigate to Settings → WAF
3. View the Whitelisted Rules section

Common Rules to Whitelist

Some rules frequently require whitelisting for specific applications:

Rule ID	Description	Common Reason
4500006	XSS Pattern Detection	Rich text editors, HTML form content
4500010	SQL Injection Pattern	Complex search queries with special chars
4500015	File Upload Validation	Custom upload validation logic
4500020	Command Injection	Admin tools with CLI features

Best Practice

• Whitelist specific Rule IDs rather than disabling entire rule sets
• Document why each rule was whitelisted
• Review whitelisted rules periodically
• Remove whitelisted rules when no longer needed

Whitelist vs. Disable Rule Sets

Whitelist individual rules when:

• Single specific rule causes issues
• You want granular control
• Most rules in the set work correctly

Disable entire rule sets when:

• Multiple rules from one set cause issues
• The entire set is incompatible with your environment
• Testing shows the set is too aggressive

Disable optional rule sets:

cpgcli waf --disable=webshell,rbl

See WAF Overview for rule set details.

Report a false positive for a WAF Rule Trigger

If you believe that the WAF rule triggered a false positive and the WAF is blocking a legitimate request, you may report it as a false positive. You may do it directly from the WAF logs page. The option to directly report a rule from the action menu against each entry ( refer image below ).

Troubleshooting

Whitelist Not Working

Symptoms: Rule still blocking after whitelisting

Solutions:

1. Wait 1-2 minutes for configuration to apply
2. Verify correct Rule ID was whitelisted
3. Manually restart web server:

   # Apache
   systemctl restart httpd
   
   # Nginx
   systemctl restart nginx
   
   # LiteSpeed
   /usr/local/lsws/bin/lswsctrl restart

4. Check whitelist was saved: cpgcli waf --whitelist --list

Wrong Rule Whitelisted

Symptoms: Original issue persists, different Rule ID in new logs

Solutions:

1. Use watch mode to confirm exact Rule ID
2. Remove incorrect rule from whitelist
3. Add correct Rule ID
4. Test again

Too Many Rules Whitelisted

Symptoms: Large whitelist, reduced security

Solutions:

1. Review all whitelisted rules
2. Test if each is still necessary
3. Remove rules no longer needed
4. Consider if application behavior can be modified instead

Security Considerations

• Whitelisting bypasses protection for specific attack patterns
• Only whitelist after confirming traffic is legitimate
• Document business justification for each whitelisted rule
• Review whitelist during security audits
• Monitor for abuse of whitelisted patterns