Alternatives to Denyhosts for all platforms with any license

  • SSHGuard icon

    SSHGuard

    Sshguard monitors services through their logging activity. It reacts to messages about dangerous activity by blocking the source address with the local firewall. Sshguard employs a clever parser that can transparently recognize...

    Open Source Mac Linux

  • Fail2ban icon

    Fail2ban

    Fail2ban scans log files (e.g. /var/log/apache/error_log) and bans IPs that show the malicious signs -- too many password failures, seeking for exploits, etc. Generally Fail2Ban is then used to update firewall rules to reject the IP...

    Open Source Linux

  • IPQ BDB icon

    IPQ BDB

    IPQ BDB filtering is done by a user space netfilter daemon that issues verdicts after looking up the IP address in a Berkeley DB. The fuzzy blocking model, freely inspired by STOCKADE, is designed to block non-distributed dictionary...

    Open Source Linux

  • RdpGuard icon

    RdpGuard

    RdpGuard allows you to protect your Remote Desktop (RDP) from brute-force attacks by blocking attacker's IP address. Fail2Ban for Windows.

    Commercial Windows

  • IPBan

    A FREE and open source application that allows banning ip addresses from failed terminal services or SQL server logins out of the box. Other types of banning are easily added via an application configuration file.

    Open Source Windows

  • HeatShield icon

    HeatShield

    HeatShield is a network firewall management service and SSH brute force blocker for Linux servers.

    Freemium Linux Web / Cloud

  • e.guardo Smart Defender icon

    e.guardo Smart Defender

    e.guardo protects your RDP, MSSQL, FTP, SMTP, EXCHANGE, OWA, LYNC, MICROSOFT DYNAMICS CRM, SHAREPOINT and many more services from Brute Force and Dictionary Attacks

    Commercial Windows Web / Cloud

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