Denyhosts

DenyHosts is an open-source program designed to help system administrators thwart SSH server attacks by blocking IP addresses using failed authentication attempts to detect attackers. It adds IP addresses to the system's /etc/hosts.deny file when it identifies too many failed SSH attempts.

Denyhosts alternatives ➤

What is Denyhosts?

DenyHosts is an open-source program created in Python that helps system administrators prevent dictionary and brute force SSH attacks by analyzing SSH server log files to identify IP addresses that are performing multiple failed login attempts. When DenyHosts detects an IP address that has surpassed the allowed threshold for failed logins, it automatically adds that IP address to the system's /etc/hosts.deny file to block any further connection attempts.

Some key features of DenyHosts include:

Easy installation and configuration on Linux/UNIX systems running OpenSSH
Customizable threshold settings to fine tune blocking behavior
Whitelisting of allowed IP addresses
Synchronization across multiple servers to block IP addresses system-wide
Logging and email alert capabilities

By leveraging DenyHosts to block access from IP addresses associated with too many failed SSH login attempts, administrators can significantly reduce malicious activity on their systems. It provides a simple yet effective extra layer of security on top of SSH for both small and large server deployments.

Official Links

Official Website
denyhosts.sourceforge.net

The Best Denyhosts Alternatives

Top Apps like Denyhosts

Fail2ban, RdpGuard, IPBanPro, AiP Defense, Cyberarms Intrusion Detection and Defense, e.guardo Smart Defender, SpyLog, CrowdSec, SSHGuard, win2ban, HeatShield, Hookem-Banem, Pyruse, IPQ BDB are some alternatives to Denyhosts.

Sugggest an alternative ❐

Fail2ban

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RdpGuard

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IPBanPro

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Cyberarms Intrusion Detection and Defense

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E.guardo Smart Defender

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SpyLog

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CrowdSec

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SSHGuard

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Win2ban

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Hookem-Banem

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Pyruse

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IPQ BDB

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