CRITICAL FIX: Skip scoring for whitelisted IPs but STILL write/track
Bug #3 (CRITICAL): Whitelisting checks used 'continue' which skipped: - All scoring logic - hits increment - Final write to persistent storage Result: Legitimate IPs or IPs with 20+ established connections NEVER accumulate hits, breaking adaptive threshold system permanently. Fix: Instead of 'continue' (skip everything), use skip_scoring flag to: 1. Skip threat intelligence gathering 2. Skip SYN_FLOOD attack scoring 3. Skip reputation bonuses 4. BUT STILL increment hits 5. AND STILL write to persistent storage This way: - Whitelisted IPs don't get scored/blocked - But their hits still increment for historical tracking - On next attempt, if whitelist is removed, they're blocked with higher hits - Adaptive threshold still works Example: Legitimate IP with 25 established connections Scan 1: Load hits=0, passes threshold, skip_scoring=1 (whitelisted) Don't score, but increment hits 0→1, write hits=1 Scan 2: Load hits=1, passes threshold, skip_scoring=1 (still whitelisted) Don't score, but increment hits 1→2, write hits=2 ... Scan 5: Load hits=4, threshold now 2 (lowered), skip_scoring=1 Don't score, increment hits 4→5, write hits=5 If in scan 6 whitelist is removed: Load hits=5, threshold=1, DO score, and since hits=5, will be blocked! Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
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@@ -2652,23 +2652,30 @@ monitor_network_attacks() {
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if [ -z "${ALERT_SENT[$ip]}" ]; then
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ALERT_SENT[$ip]=1
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# Smart whitelisting: Skip IPs with MANY successful established connections
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# Smart whitelisting: Skip SCORING for IPs with MANY successful established connections
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# But still track them - don't skip the write!
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# Only whitelist if IP has 20+ established connections (highly unlikely for attacker)
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# CRITICAL FIX: Use -w flag to match whole word (prevent partial IP matches)
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# Example: "1.1.1.1" should not match "11.1.1.1" or "119.1.1.1"
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local established_conns=$(ss -tn state established 2>/dev/null | grep -w "$ip" | wc -l)
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[ -z "$established_conns" ] && established_conns=0
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local skip_scoring=0
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if [ "$established_conns" -ge 20 ]; then
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# IP has 20+ established connections = highly likely legitimate user
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continue # Now safe - hits already persisted
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# Skip scoring but STILL write/track (for historical hits)
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skip_scoring=1
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fi
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# Check if whitelisted service
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if [ "$skip_scoring" -eq 0 ] && [ "${hits:-0}" -eq 1 ]; then
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# Only check whitelist on first detection, and only if not already skipped
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if is_whitelisted_service "$ip" 2>/dev/null; then
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skip_scoring=1 # Skip scoring but STILL write/track
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fi
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fi
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# Enhanced threat intelligence on first detection
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if [ "${hits:-0}" -eq 1 ]; then
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# Check if whitelisted service first
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if is_whitelisted_service "$ip" 2>/dev/null; then
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continue # Now safe - hits already persisted
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fi
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if [ "$skip_scoring" -eq 0 ] && [ "${hits:-0}" -eq 1 ]; then
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# Get threat intelligence in background to avoid slowdown
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(
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@@ -2737,15 +2744,17 @@ monitor_network_attacks() {
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http_attack_bonus=25 # Already known attacker, very suspicious
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fi
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# Record attack intelligence
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record_attack_timestamp "$ip"
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record_attack_vector "$ip" "NETWORK"
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track_subnet_attack "$ip"
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# Only do scoring/tracking if not whitelisted
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if [ "$skip_scoring" -eq 0 ]; then
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# Record attack intelligence
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record_attack_timestamp "$ip"
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record_attack_vector "$ip" "NETWORK"
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track_subnet_attack "$ip"
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# Add SYN_FLOOD to attacks if not already present
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if [[ ! "$attacks" =~ SYN_FLOOD ]]; then
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[ -z "$attacks" ] && attacks="SYN_FLOOD" || attacks="${attacks},SYN_FLOOD"
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fi
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# Add SYN_FLOOD to attacks if not already present
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if [[ ! "$attacks" =~ SYN_FLOOD ]]; then
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[ -z "$attacks" ] && attacks="SYN_FLOOD" || attacks="${attacks},SYN_FLOOD"
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fi
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# Progressive scoring based on connection count
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# 20-50 conns: +15 pts, 50-100: +25 pts, 100+: +40 pts
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@@ -2924,8 +2933,9 @@ monitor_network_attacks() {
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block_reasons="${block_reasons}${timing_reason}"
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fi
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# Cap at 100
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[ "$score" -gt 100 ] && score=100
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# Cap at 100
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[ "$score" -gt 100 ] && score=100
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fi # End of skip_scoring check
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# INCREMENT HITS AFTER ALL SCORING
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# Moved from before whitelisting to ensure we have complete data
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