Tag: Firewall

Control Panels Jan 19, 2025

How to Install aaPanel on a VPS or Dedicated Server (Step by Step, 2026)

Learn how to install and configure aaPanel, a lightweight and user-friendly server control panel, on your UnderHost VPS or dedicated server. This step-by-step guide includes installation commands, system requirements, and optimization tips to streamline your server management. With support for LAMP, LNMP, SSL, and backups, aaPanel is the perfect tool for developers and businesses.

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Hosting Guides Dec 15, 2024

Hosting for Crypto-Related Projects: Checks and Limits

As blockchain technology and cryptocurrencies revolutionize industries, businesses in the sector face unique challenges. Offshore hosting has emerged as the preferred choice for crypto enterprises due to its focus on privacy, regulatory flexibility, and robust infrastructure. UnderHost.com offers tailor-made offshore hosting solutions to empower these businesses in a rapidly evolving landscape.

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Control Panels Sep 19, 2024

Essential Free cPanel Plugins for Server Management

Since ConfigServer has closed public access to their scripts (all licensed under GPL v3), we're now providing a mirror for these utilities to ensure continued access for our clients.

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Control Panels Feb 26, 2016

IP Geolocation on cPanel: GeoLite2 Setup with PHP, Apache and CSF (2026)

GeoIP allows websites to detect a visitor’s location based on their IP address. It provides details such as country, city, ISP, and connection type. If you're running a cPanel server and need to install GeoIP, follow this updated guide for 2025.

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Linux Feb 25, 2016

Common SSH Commands or Linux Shell Commands

Master critical SSH and Linux shell commands with UnderHost.com. Discover how efficient server management starts with powerful terminal skills. Learn the commands that keep your offshore servers, cloud hosting, and dedicated servers running smoothly.

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Control Panels Feb 25, 2016

How to Install and Configure CSF Firewall (v15 GPL) on cPanel and Linux Servers

ConfigServer Security & Firewall (CSF) is a popular firewall for Linux servers that includes a login failure daemon (lfd) to detect and block brute-force attacks. This guide will walk you through installing and configuring CSF on your server.

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Control Panels Dec 14, 2015

cPanel IP Blocker (IP Deny Manager): How to Block IP Addresses From Your Website

The IP Deny Manager in cPanel allows you to block specific IP addresses, domains, or entire IP ranges from accessing your website. This feature is useful for preventing malicious visitors, spam attacks, and unauthorized access.

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Domains & DNS Feb 27, 2010

WHM Cannot Create Accounts or Updates Fail? Fix Server DNS Resolution

DNS resolution failures can cause serious connectivity issues on your server. If your system can’t resolve domain names, it could be due to a misconfigured /etc/resolv.conf or missing Perl modules. This guide walks you through troubleshooting steps to restore DNS functionality efficiently.

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Control Panels Feb 27, 2010

cPanel “sshd has failed, please contact the sysadmin”: Causes and Fixes

This alert comes from cPanel's service monitor (chkservd) when it cannot reach the SSH service. First check whether SSH really is down: systemctl status sshd. If it is stopped, test the configuration with sshd -t, fix the error it shows, and start it with /scripts/restartsrv_sshd. If SSH works but the alert continues, the monitor is probably checking the wrong port after a port change. Use your provider's console if you cannot log in at all.

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UnderHost Blog

Guides, security notes and news for modern hosting.

Practical, real-world articles on offshore hosting, Linux and cPanel administration, server security and the technology behind our network, written by the UnderHost team.