Documents the 2026-04-09 scanner incident where 301-redirected PHP probes
bypassed the existing apache-404scan jail, leaving the scanner unbanned
and firing Netdata web_log_1m_redirects alerts. New jail catches 301/302/
403/404 PHP responses while excluding legitimate WordPress endpoints.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Adds a section documenting how missing HTTP/HTTPS rules caused a
site outage on tttpod, and updates the fleet reference table.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Article count 73 → 74. Added to SUMMARY.md, index.md, README.md,
and 02-selfhosting/index.md (which was also missing 5 other security
articles from prior sessions).
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Access-log-based filter for wp-login.php brute force detection without
requiring the WP fail2ban plugin. Documents the backend=polling gotcha
on Ubuntu 24.04 and manual banning workflow.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Fixed 4 broken markdown links (bad relative paths in See Also sections)
- Corrected n8n port binding to 127.0.0.1:5678 (matches actual deployment)
- Updated SnapRAID article with actual majorhome paths (/majorRAID, disk1-3)
- Converted 67 Obsidian wikilinks to relative markdown links or plain text
- Added YAML frontmatter to 35 articles missing it entirely
- Completed frontmatter on 8 articles with missing fields
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
New article: selinux-fail2ban-execmem-fix.md — custom policy module
for fail2ban grep execmem denial on Fedora 43.
Also includes previously uncommitted:
- n8n-proxy-trust-x-forwarded-for.md
- fail2ban-apache-404-scanner-jail.md updates
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Global backend=systemd in jail.local silently breaks file-based jails.
Added required backend=polling to config, diagnostic command, and warning.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Covers version checking, pinned-tag update process, SQLite password
reset, and why Arcane may not catch updates when the latest tag lags
behind npm releases.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
New guide for custom access-log-based fail2ban jail that catches
rapid-fire 404 vulnerability scanners missed by default error-log jails.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Add troubleshooting article for the 2026-03-27 incident where PHP-FPM
hung after the nightly update cycle. Update the Netdata Docker alarm
tuning article with the dedicated Nextcloud alarm split and the new
watchdog cron deployed to majorlab. (54 articles)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
