{
"event": "PreToolUse",
"tool_name": "Task",
"tool_input": {
"description": "Check bot-blocks log source",
"prompt": "Connect to ssh root@prod.karlkratz.com and investigate how bot-blocks.log is generated and how fail2ban reads it:\n\n1. Check the fail2ban karlkratz-bot jail config to see what logpath and filter it uses:\n ssh root@prod.karlkratz.com \"grep -A 20 'karlkratz-bot' \/etc\/fail2ban\/jail.local\"\n\n2. Check the fail2ban filter for karlkratz-bot:\n ssh root@prod.karlkratz.com \"cat \/etc\/fail2ban\/filter.d\/karlkratz-bot.conf 2>\/dev\/null; cat \/etc\/fail2ban\/filter.d\/karlkratz-bot.local 2>\/dev\/null\"\n\n3. Check the last 30 entries of bot-blocks.log to see the format and if 66.249.92.161 appears:\n ssh root@prod.karlkratz.com \"tail -30 \/var\/log\/apache2\/bot-blocks.log 2>\/dev\/null; echo '==='; tail -30 \/var\/log\/apache2\/bot-blocks.log-20260215 2>\/dev\/null\"\n\n4. Search BotDetectionService.php for where it writes to log files (bot-blocks.log):\n ssh root@prod.karlkratz.com \"grep -n 'bot-blocks\\|bot_blocks\\|logBlock\\|writeLog\\|file_put\\|error_log\\|openlog\\|syslog\\|fwrite\\|log(' \/var\/www\/prod.karlkratz.de\/src\/Services\/BotDetectionService.php\"\n\n5. Check Apache config for bot-blocks log:\n ssh root@prod.karlkratz.com \"grep -r 'bot-blocks' \/etc\/apache2\/ 2>\/dev\/null\"\n\n6. Check if there's a middleware or handler that writes to bot-blocks.log:\n ssh root@prod.karlkratz.com \"grep -rn 'bot-blocks\\|bot_blocks' \/var\/www\/prod.karlkratz.de\/src\/ 2>\/dev\/null | head -20\"\n\n7. Check recent entries with 66.249 in bot-blocks.log:\n ssh root@prod.karlkratz.com \"grep '66.249' \/var\/log\/apache2\/bot-blocks.log-20260215 2>\/dev\/null | tail -20; echo '==='; grep '66.249' \/var\/log\/apache2\/bot-blocks.log 2>\/dev\/null | tail -20\"\n",
"subagent_type": "Bash"
}
}
{
"tool_response": {
"status": "completed",
"prompt": "Connect to ssh root@prod.karlkratz.com and investigate how bot-blocks.log is generated and how fail2ban reads it:\n\n1. Check the fail2ban karlkratz-bot jail config to see what logpath and filter it uses:\n ssh root@prod.karlkratz.com \"grep -A 20 'karlkratz-bot' \/etc\/fail2ban\/jail.local\"\n\n2. Check the fail2ban filter for karlkratz-bot:\n ssh root@prod.karlkratz.com \"cat \/etc\/fail2ban\/filter.d\/karlkratz-bot.conf 2>\/dev\/null; cat \/etc\/fail2ban\/filter.d\/karlkratz-bot.local 2>\/dev\/null\"\n\n3. Check the last 30 entries of bot-blocks.log to see the format and if 66.249.92.161 appears:\n ssh root@prod.karlkratz.com \"tail -30 \/var\/log\/apache2\/bot-blocks.log 2>\/dev\/null; echo '==='; tail -30 \/var\/log\/apache2\/bot-blocks.log-20260215 2>\/dev\/null\"\n\n4. Search BotDetectionService.php for where it writes to log files (bot-blocks.log):\n ssh root@prod.karlkratz.com \"grep -n 'bot-blocks\\|bot_blocks\\|logBlock\\|writeLog\\|file_put\\|error_log\\|openlog\\|syslog\\|fwrite\\|log(' \/var\/www\/prod.karlkratz.de\/src\/Services\/BotDetectionService.php\"\n\n5. Check Apache config for bot-blocks log:\n ssh root@prod.karlkratz.com \"grep -r 'bot-blocks' \/etc\/apache2\/ 2>\/dev\/null\"\n\n6. Check if there's a middleware or handler that writes to bot-blocks.log:\n ssh root@prod.karlkratz.com \"grep -rn 'bot-blocks\\|bot_blocks' \/var\/www\/prod.karlkratz.de\/src\/ 2>\/dev\/null | head -20\"\n\n7. Check recent entries with 66.249 in bot-blocks.log:\n ssh root@prod.karlkratz.com \"grep '66.249' \/var\/log\/apache2\/bot-blocks.log-20260215 2>\/dev\/null | tail -20; echo '==='; grep '66.249' \/var\/log\/apache2\/bot-blocks.log 2>\/dev\/null | tail -20\"\n",
"agentId": "aaae1a5",
"content": [
{
"type": "text",
"text": "Here is the complete picture of how `bot-blocks.log` is generated and how fail2ban reads it.\n\n---\n\n## How bot-blocks.log is Generated\n\n**Source file:** `\/var\/www\/prod.karlkratz.de\/src\/Services\/BotDetectionService.php`\n\nAt line 42, a constant defines the log path:\n```php\nprivate const FAIL2BAN_LOG = '\/var\/log\/apache2\/bot-blocks.log';\n```\n\nAt line 676, the method `logToFail2ban()` writes entries:\n```php\nprivate function logToFail2ban(string $ip, string $reason, string $userAgent = ''): void\n{\n $timestamp = date('Y-m-d H:i:s');\n $safeReason = preg_replace('\/[^a-zA-Z0-9\\s\\-_]\/', '', $reason);\n $logLine = sprintf(\n \"[%s] BOT_BLOCK IP=%s REASON=%s UA=%s\\n\",\n $timestamp, $ip, $safeReason,\n substr(preg_replace('\/[^a-zA-Z0-9\\s\\-_\\\/\\.]\/', '', $userAgent), 0, 80)\n );\n file_put_contents(self::FAIL2BAN_LOG, $logLine, FILE_APPEND | LOCK_EX);\n}\n```\n\nThis is a **PHP application-level log** -- it is NOT generated by Apache itself. The PHP `BotDetectionService` directly appends to `\/var\/log\/apache2\/bot-blocks.log` using `file_put_contents` with `FILE_APPEND | LOCK_EX`. There is no Apache `CustomLog` directive for this file (the grep of `\/etc\/apache2\/` returned nothing).\n\n**Log format:**\n```\n[2026-02-15 05:31:03] BOT_BLOCK IP=66.249.92.161 REASON=unknown_bot_Generic Bot UA=Mozilla\/5.0 Linux Android...\n```\n\n---\n\n## How fail2ban Reads It\n\n**Jail config** in `\/etc\/fail2ban\/jail.local`:\n```ini\n[karlkratz-bot]\nenabled = true\nport = http,https\nfilter = karlkratz-bot\nlogpath = \/var\/log\/apache2\/bot-blocks.log\nmaxretry = 1\naction = nftables-allports\nfindtime = 60\nbantime = -1\n```\n\nKey settings:\n- **maxretry = 1** -- A single log entry triggers a ban (no second chance).\n- **bantime = -1** -- The ban is permanent (never expires).\n- **action = nftables-allports** -- Blocks the IP on ALL ports via nftables.\n- **findtime = 60** -- The single entry must occur within 60 seconds (trivially satisfied with maxretry=1).\n\n**Filter** at `\/etc\/fail2ban\/filter.d\/karlkratz-bot.conf`:\n```ini\n[Definition]\nfailregex = BOT_BLOCK IP=<HOST> REASON=\nignoreregex =\ndatepattern = \\[%%Y-%%m-%%d %%H:%%M:%%S\\]\n```\n\nThe filter matches any line containing `BOT_BLOCK IP=<HOST> REASON=`, where `<HOST>` is fail2ban's placeholder for the offending IP address. The `datepattern` tells fail2ban how to parse the timestamp in square brackets.\n\n---\n\n## The 66.249.92.161 (Googlebot) Situation\n\nThere is exactly **one entry** for `66.249.92.161` in today's log:\n```\n[2026-02-15 05:31:03] BOT_BLOCK IP=66.249.92.161 REASON=unknown_bot_Generic Bot UA=Mozilla\/5.0 Linux Android 6.0.1 Nexus 5X Build\/MMB29P AppleWebKit\/537.36 KHTML l\n```\n\nSince `maxretry = 1` and `bantime = -1`, this single entry caused a **permanent ban** of Google's crawler IP via nftables on all ports. The reason logged was `unknown_bot_Generic Bot` -- meaning the `BotDetectionService.php` classified Googlebot's user agent as a generic unknown bot rather than recognizing it as a legitimate search engine crawler."
}
],
"totalDurationMs": 43726,
"totalTokens": "[REDACTED]",
"totalToolUseCount": 15,
"usage": {
"input_tokens": "[REDACTED]",
"cache_creation_input_tokens": "[REDACTED]",
"cache_read_input_tokens": "[REDACTED]",
"output_tokens": "[REDACTED]",
"server_tool_use": {
"web_search_requests": 0,
"web_fetch_requests": 0
},
"service_tier": "standard",
"cache_creation": {
"ephemeral_1h_input_tokens": "[REDACTED]",
"ephemeral_5m_input_tokens": "[REDACTED]"
},
"inference_geo": "",
"iterations": [],
"speed": "standard"
}
}
}