What is blocklist.de?

blocklist.de is a community-driven fail2ban reporting system that aggregates attack data from participating servers. While primarily focused on SSH, FTP, and web attacks, their data is sometimes used for email filtering.

Impact Level: Low. Primarily used for firewall blocking rather than email filtering, but some systems do query it.

Zone: bl.blocklist.de

What triggers listing:

• Brute force attacks reported by fail2ban instances
• SSH/FTP/**SMTP** authentication attacks
• Web application attacks (SQL injection, etc.)
• Reports from participating community members

Key characteristics:

• Community-sourced data from fail2ban users
• Listings include attack type and reporting sources
• Focus is on attack prevention rather than spam

Delisting: Visit blocklist.de/en/delist.html

blocklist.de is the neighborhood watch of the internet - volunteers reporting suspicious activity they've witnessed at their own digital doorsteps.