Friday, August 1, 2025

Blocking AI Crawlers in Caddy with DNSBL – Insights from Gea-Suan Lin’s Blog

Enhancing Web Security with DNSBL: A Practical Approach

In today’s digital landscape, security challenges like unwanted bot attacks are ever-present. Recently, my personal wiki faced such an intrusion, prompting a deeper dive into protective solutions.

Key Takeaways:

  • Innovative Defense: Employed DNSBL (Domain Name System-based Blackhole List) to thwart automation attacks effectively.
  • Tool Selection: After evaluating various options, SpamRATS emerged as the top choice for filtering potential spam bots.
  • Integration: Implemented the caddy-matcher-dnsbl project, showcasing impressive results in reducing malicious requests.

Implementation Insights:

  • Combine multiple DNSBLs for a robust defense.
  • Utilize specific error codes in response to blocked requests for better access log tracking.
  • Local DNS servers can avert common blocking issues from public DNS like 1.1.1.1.

Stay ahead of cyber threats—consider exploring DNSBL for your projects today. Feel free to share your thoughts or experiences with web security in the comments!

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