Fail2ban
Fail2ban is a daemon that automatically bans IP addresses showing malicious behavior by monitoring log files and updating firewall rules to prevent brute-force attacks.

Fail2ban
Fail2ban is a daemon that automatically bans IP addresses showing malicious behavior by monitoring log files and updating firewall rules to prevent brute-force attacks.
Fail2ban Description
Fail2ban is a daemon that monitors log files for suspicious activity and automatically implements IP address bans through firewall rule modifications. The tool scans various log files to identify patterns indicative of malicious behavior, such as repeated authentication failures, brute-force attempts, and other attack signatures. When suspicious activity is detected from a specific IP address, Fail2ban temporarily blocks that address by updating firewall rules. The daemon operates by parsing log entries in real-time and applying configurable filters to identify potential threats. It supports multiple services including SSH, HTTP, FTP, and other network services that generate log entries. The tool can be configured with custom rules, ban durations, and threshold settings to match specific security requirements. Fail2ban integrates with various firewall systems including iptables, firewalld, and other packet filtering mechanisms. It maintains a database of banned IP addresses and can automatically remove bans after specified time periods. The tool also supports whitelisting of trusted IP addresses to prevent accidental blocking of legitimate traffic.
FEATURED
Password manager with end-to-end encryption and identity protection features
VPN service providing encrypted internet connections and privacy protection
Fractional CISO services for B2B companies to accelerate sales and compliance
Stay Updated with Mandos Brief
Get the latest cybersecurity updates in your inbox
TRENDING CATEGORIES
POPULAR
Security platform that provides protection, monitoring and governance for enterprise generative AI applications and LLMs against various threats including prompt injection and data poisoning.
A threat intelligence aggregation service that consolidates and summarizes security updates from multiple sources to provide comprehensive cybersecurity situational awareness.
Fabric Platform is a cybersecurity reporting solution that automates and standardizes report generation, offering a private-cloud platform, open-source tools, and community-supported templates.
A weekly newsletter providing cybersecurity leadership insights, industry updates, and strategic guidance for security professionals advancing to management positions.