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ConfigServer Security & Firewall is the most commonly used software firewall in a shared hosting environment. Due to multiple failed login attempts for shared hosting accounts, users get temporarily blocked in the CSF firewall and encounters the warning message. Learn, how to unblock yourself from CSF on Shared/Reseller services. First, you try to access the […]

Managing Login Failure Daemon (LFD) from DirectAdmin

Category: DirectAdmin
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Login Failure Daemon popularly known as LFD comes with the ConfigServer Security & Firewall. At KnownHost all the managed services are being deployed with ConfigServer Security & Firewall as software based firewall and basic monitoring system to avoid unwanted attacks and the notification of certain events. LFD perticularly track and log the activities which are […]

Managing Login Failure Daemon (LFD) from WHM

Category: cPanel
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The Login Failure Daemon (LFD) is a part of the ConfigServer Security & Firewall (CSF) application that is available for Linux servers. It’s the firewall that comes preinstalled on any Managed KnownHost server and it’s a product that we’re very familiar with. This particular part of the application handles the tracking and logging of what […]

How To Enable Port Knocking in CSF/LFD

Below, we will outline two different methods of configuring port knocking with CSF/LFD (via CLI and via GUI). This can be quite helpful for maintaining SSH functionality while also addressing PCI Scans failures due to SSH. Via CLI Log in as root via SSH. Remember that KH servers use port 2200 by default for SSH connections. […]

Common CSF/LFD False Positives and How to Stop The Notifications

Category: Courses
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It is worrisome when you receive a notification from the firewall regarding a suspicious process, especially for those processes that you do not readily recognize. That is why KnownHost has compiled a list of some common alerts that are mostly false positives and provided the instructions for stopping the notifications. This list is specific to […]

Introduction to CSF/LFD Notifications

Category: Courses
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ConfigServer Security & Firewall (csf) with Login Failure Daemon (lfd) is “A Stateful Packet Inspection (SPI) firewall, Login/Intrusion Detection and Security application for Linux servers.”official page)) This comes pre-installed on our cPanel servers and has many useful features to assist you with detecting events which might be indicative of security issues in your server. If it […]

How to use Dynamic DNS to automatically whitelist your IP?

Category: Guides
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Dynamic DNS offers a resolution to a common problem that many users have. ISP’s constantly change their IP, and for one reason or another, they get blocked by their server’s firewall. Often, it’s not the user’s fault. Its not that they are logging in 40 times with the wrong password, but rather they’ve simply exceeded the firewall’s […]