WHM shows its first-login wizard until the marker file /etc/.whostmgrft exists. Automated builds can create that file, but only after they set what the wizard would have set: the server contact email and the nameservers in /etc/wwwacct.conf, a valid hostname, and the licence. Check every value in WHM afterwards, and test the whole build on a spare server before you use it for production.
Spam emails can overload your cPanel server and affect deliverability. By optimizing Exim and Tweak Settings in WHM, you can significantly reduce spam and secure your mail server. Follow this step-by-step guide to configure your server for better email security.
Keeping Exim up to date is crucial for security and performance on cPanel servers. cPanel provides a built-in script to upgrade Exim manually. Follow this quick guide to update your mail server with a single command.
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.
Start from a fresh, supported operating system (for example AlmaLinux 9), set a fully qualified hostname, update the system, then run the installer as root inside screen: cd /home && curl -o latest -L https://securedownloads.cpanel.net/latest && sh latest. When it finishes, open https://your-server-ip:2087 and complete the setup in WHM. Most install errors come from a server that is not fresh, a bad hostname, or too little disk space.
Disable Mailman mailing lists on your cPanel server by modifying its execute permissions.
The warning means Apache's worker limit (MaxRequestWorkers, called MaxClients before Apache 2.4) is set higher than ServerLimit allows, so Apache lowers it at start-up. On cPanel, change both values in WHM > Service Configuration > Apache Configuration > Global Configuration, not in httpd.conf. With the event or worker MPM, ServerLimit × ThreadsPerChild must be at least MaxRequestWorkers; with prefork, ServerLimit must be at least MaxRequestWorkers.
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.
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.