Remove all ACL-to-ACL references for HAProxy 3.0.11 compatibility
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Final fix for HAProxy 3.0.11 syntax requirements:

ACL Reference Resolution:
- Removed all compound ACLs that referenced other ACLs
- Updated all http-request rules to use base ACLs directly
- HAProxy 3.0 does not allow ACL-to-ACL references

Direct Base ACL Usage:
- bot_scanner: Scanner user agent detection
- scan_admin: Admin path scanning
- scan_shells: Shell/exploit attempts
- sql_injection: SQL injection patterns
- directory_traversal: Path traversal attempts
- wp_403_abuse: WordPress 403 failures
- rate_abuse: Rate limit violations
- suspicious_method: Dangerous HTTP methods
- missing_accept_header: Missing browser headers
- blacklisted: Blacklisted IPs
- auto_blacklist_candidate: Auto-ban candidates

Graduated Response System (Direct ACL Based):
- Low threat (info): rate_abuse, suspicious_method, missing headers
- Medium threat (warning + tarpit): sql_injection, directory_traversal, wp_403_abuse
- High threat (alert + deny): bot_scanner, scan_admin, scan_shells
- Critical threat (alert + deny): blacklisted, auto_blacklist_candidate

Monitoring Updates:
- Updated log parsing for base ACL names
- Enhanced threat classification in monitoring scripts

All syntax is now pure HAProxy 3.0.11 compatible while maintaining
comprehensive security protection with graduated responses.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
2025-09-22 17:44:44 -07:00
parent ee8223c25f
commit 0ee9e6cba8
3 changed files with 268 additions and 47 deletions

View File

@@ -84,59 +84,42 @@ frontend web
# We focus on clear scanner indicators rather than all errors for WordPress paths
# since 404s on wp-admin are normal (CSS, JS files, etc.)
# Combine conditions to identify actual attacks vs legitimate use
# WordPress-specific attack detection (combining path + threat indicators)
acl wp_scanner_detected is_wordpress_path bot_scanner
acl wp_brute_force_detected wp_403_abuse
acl wp_suspicious_detected is_wordpress_path bot_empty
# WordPress brute force detection now based on actual 403 failures (5+ in 10s)
# This catches real authentication failures, not just POST requests
# Simplified threat detection for HAProxy 3.0 compatibility
# Direct threat level classification based on individual indicators
acl high_threat_detected bot_scanner
acl high_threat_scan scan_admin
acl high_threat_shells scan_shells
acl medium_threat_injection sql_injection
acl medium_threat_traversal directory_traversal
acl medium_threat_wp_attack wp_brute_force_detected
acl low_threat_rate rate_abuse
acl low_threat_method suspicious_method
acl low_threat_headers missing_accept_header
acl critical_threat_blacklist blacklisted
acl critical_threat_autoban auto_blacklist_candidate
# All threat detection will be done directly in http-request rules
# using the base ACLs defined above to avoid ACL-reference issues
# 5. Dynamic blacklisting based on threat level
# 5. Dynamic blacklisting based on threat level (using base ACLs directly)
http-request sc-inc-gpc0(1) if auto_blacklist_candidate
http-request sc-inc-gpc1(1) if high_threat_detected or high_threat_scan or high_threat_shells
http-request sc-inc-gpc1(1) if critical_threat_blacklist or critical_threat_autoban
http-request sc-inc-gpc1(1) if bot_scanner or scan_admin or scan_shells
http-request sc-inc-gpc1(1) if blacklisted
# Mark current session as bad based on threat level
http-request sc-set-gpc0(0) 1 if medium_threat_injection or medium_threat_traversal or medium_threat_wp_attack
http-request sc-set-gpc0(0) 1 if high_threat_detected or high_threat_scan or high_threat_shells
http-request sc-set-gpc0(0) 1 if critical_threat_blacklist or critical_threat_autoban
http-request sc-set-gpc0(0) 1 if sql_injection or directory_traversal or wp_403_abuse
http-request sc-set-gpc0(0) 1 if bot_scanner or scan_admin or scan_shells
http-request sc-set-gpc0(0) 1 if blacklisted or auto_blacklist_candidate
# 6. Graduated response system based on threat level
# Low threat: Warning header only
http-request set-header X-Security-Warning "rate-limit-approaching" if low_threat_rate !legitimate_bot !wordpress_app !browser_ua
http-request set-header X-Security-Warning "suspicious-method" if low_threat_method !legitimate_bot !wordpress_app !browser_ua
http-request set-header X-Security-Warning "missing-headers" if low_threat_headers !legitimate_bot !wordpress_app !browser_ua
http-request set-header X-Security-Warning "rate-limit-approaching" if rate_abuse !legitimate_bot !wordpress_app !browser_ua
http-request set-header X-Security-Warning "suspicious-method" if suspicious_method !legitimate_bot !wordpress_app !browser_ua
http-request set-header X-Security-Warning "missing-headers" if missing_accept_header !legitimate_bot !wordpress_app !browser_ua
# Medium threat: Tarpit delay
http-request tarpit if medium_threat_injection !legitimate_bot !wordpress_app !browser_ua
http-request tarpit if medium_threat_traversal !legitimate_bot !wordpress_app !browser_ua
http-request tarpit if medium_threat_wp_attack !legitimate_bot !wordpress_app !browser_ua
http-request tarpit if sql_injection !legitimate_bot !wordpress_app !browser_ua
http-request tarpit if directory_traversal !legitimate_bot !wordpress_app !browser_ua
http-request tarpit if wp_403_abuse !legitimate_bot !wordpress_app !browser_ua
# High threat: Immediate deny
http-request deny deny_status 403 if high_threat_detected !legitimate_bot !wordpress_app !browser_ua
http-request deny deny_status 403 if high_threat_scan !legitimate_bot !wordpress_app !browser_ua
http-request deny deny_status 403 if high_threat_shells !legitimate_bot !wordpress_app !browser_ua
http-request deny deny_status 403 if wp_scanner_detected !legitimate_bot !wordpress_app !browser_ua
http-request deny deny_status 403 if bot_scanner !legitimate_bot !wordpress_app !browser_ua
http-request deny deny_status 403 if scan_admin !legitimate_bot !wordpress_app !browser_ua
http-request deny deny_status 403 if scan_shells !legitimate_bot !wordpress_app !browser_ua
http-request deny deny_status 403 if is_wordpress_path bot_scanner !legitimate_bot !wordpress_app !browser_ua
# Critical threat: Blacklist and deny
http-request deny deny_status 403 if critical_threat_blacklist
http-request deny deny_status 403 if critical_threat_autoban
http-request deny deny_status 403 if blacklisted
http-request deny deny_status 403 if auto_blacklist_candidate
# Additional immediate threat rules
http-request deny if repeat_offender
@@ -164,11 +147,11 @@ frontend web
http-request capture var(txn.real_ip) len 40
http-request capture req.hdr(user-agent) len 150
# Set log level based on threat level
http-request set-log-level info if low_threat_rate or low_threat_method or low_threat_headers
http-request set-log-level warning if medium_threat_injection or medium_threat_traversal or medium_threat_wp_attack
http-request set-log-level alert if high_threat_detected or high_threat_scan or high_threat_shells
http-request set-log-level alert if critical_threat_blacklist or critical_threat_autoban
# Set log level based on threat level (using base ACLs directly)
http-request set-log-level info if rate_abuse or suspicious_method or missing_accept_header
http-request set-log-level warning if sql_injection or directory_traversal or wp_403_abuse
http-request set-log-level alert if bot_scanner or scan_admin or scan_shells
http-request set-log-level alert if blacklisted or auto_blacklist_candidate
# Track WordPress paths for 403 response monitoring
http-request set-var(txn.is_wp_path) int(1) if is_wordpress_path