cPanel
How to log in to cPanel (MdmHost dashboard, URL and port 2083)
All the ways to open your cPanel account: one click from the MdmHost dashboard, the direct cPanel URL on port 2083, and what to do when the login fails.
MdmHost guides
Step-by-step help for your hosting
1,794 practical guides for cPanel, Plesk and DirectAdmin, Linux and Windows servers, websites, databases, DNS and security, from your first login to troubleshooting.
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- Getting startedYour first hour with a new server: access, logins and basics.83 guides
- cPanelFiles, databases, email, domains and every cPanel tool, step by step.67 guides
- WHM & resellingWHM, packages, reseller accounts, WHMReseller and running a hosting brand.53 guides
- WordPressInstall, secure, speed up, migrate and fix WordPress sites.49 guides
- Email & webmailMailboxes, webmail, forwarders, spam filters and email delivery.67 guides
- DomainsRegistering, transferring and managing domains and nameservers.27 guides
- SSL certificatesFree AutoSSL, Let's Encrypt, paid certificates and HTTPS.41 guides
- CloudLinuxCloudLinux setup and use: LVE limits, CloudLinux Manager, CageFS and PHP/Node.js selectors.31 guides
- LiteSpeedLiteSpeed Web Server, LSCache and the LiteSpeed Cache plugin: install, settings and tuning.35 guides
- Imunify360Malware scanning, firewall and proactive defence with Imunify360.24 guides
- SoftaculousInstall, update, clone and back up apps with Softaculous.24 guides
- WP SquaredcPanel's WordPress platform: sites, plugins, staging and backups.9 guides
- SitePadBuild and publish websites with the SitePad builder.9 guides
- SitejetDesign, edit and publish sites with the Sitejet builder.9 guides
- WHMResellerAlpha and master resellers with WHMReseller: install, setup and use.12 guides
- VirtFusionInstall, set up and manage VirtFusion: hypervisors, packages, servers and WHMCS integration.28 guides
- VirtualizorManage your VPS with Virtualizor: power, OS reinstall, VNC, IPs and backups.44 guides
- PleskWebsites, email, databases and settings in the Plesk panel.53 guides
- DirectAdminUsers, domains, email and reseller tools in DirectAdmin.41 guides
- WHMCSBilling, automation, products and client management with WHMCS.52 guides
- Control panelscPanel & WHM, Plesk, DirectAdmin and other panels on your VPS.107 guides
- SecurityKeys, passwords, firewalls and keeping a server patched.138 guides
- Networking & DNSIP addresses, reverse DNS, ports and traffic.72 guides
- Websites & appsWeb servers, WordPress, PHP, Node.js, SSL and app hosting.83 guides
- DatabasesMySQL, MariaDB, PostgreSQL, Redis and MongoDB on a VPS.80 guides
- Billing & accountInvoices, renewals, the client area and your account.9 guides
- TroubleshootingWhen something is not working: checks and fixes.127 guides
- Linux VPSSSH, packages, services and everyday Linux administration.265 guides
- Windows VPS & RDPRemote Desktop, Windows Server settings and Admin RDP tips.73 guides
- Docker & DevOpsContainers, Git deploys, automation, monitoring and backups.82 guides
Popular guides
Windows VPS & RDP
Keep apps running 24/7 on your RDP
Disconnect instead of signing out, check session time limits and power settings, and make programs start again after a restart.
Windows VPS & RDP
Connect to your Admin RDP from Windows, Mac and phone
Find your login details, then connect to your Admin RDP or Windows VPS with the free Remote Desktop clients for Windows, macOS, iPhone and Android.
Troubleshooting
Fix "Remote Desktop can't connect to the remote computer"
Check the server is running, test the RDP port, rule out network blocks and repair Remote Desktop settings from the browser console.
Getting started
Set up a private remote work desktop on Admin RDP
Secure your Admin RDP, install everyday apps, personalise it, and learn when to disconnect versus sign out so your work keeps running.
cPanel
Restore files and folders from JetBackup 5 in cPanel
Restore deleted or broken website files from MdmHost's daily JetBackup 5 snapshots in cPanel: pick a date, choose files or folders, and restore or download them.
Explore all guides
A fresh mix every day. Pick a topic above to narrow it down.
Manage IP addresses in Plesk: shared, dedicated and IPv6
Add and reread IP addresses in Plesk, mark them shared or dedicated, assign IPs to resellers and subscriptions, set a default certificate and use IPv6.
How to fix email 554 errors (transaction failed and rejected)
A 554 bounce means the receiving server rejected your email outright, usually for spam, policy or blocklist reasons. Learn how to read 554 messages and fix your sending setup.
LiteSpeed Web Server explained: why it makes your hosting faster
What LiteSpeed Web Server is, how it differs from Apache and Nginx, why it speeds up WordPress and PHP sites, and what it means for your cPanel hosting.
Linux file permissions explained (rwx, owner, group, others)
Learn to read ls -l output, what read, write and execute mean for files and folders, how owner, group and others work, and which numeric values like 644 and 755 to use.
SMTP reply codes explained: 2xx, 4xx and 5xx email errors
How to read SMTP reply codes and enhanced status codes in bounces and logs, what common 421, 450, 550, 552 and 554 errors mean, and what to do about each one.
Secure Nginx with a free Let's Encrypt SSL certificate
Install Certbot, issue a free certificate for your domain, redirect HTTP to HTTPS and make sure renewal runs on its own.
Server monitoring basics: what to watch and which tools to use
The metrics every server should be monitored for (uptime, CPU, RAM, disk, I/O, network, services, SSL), sensible alert thresholds, and free tools from htop to Netdata and Uptime Kuma.
Configure a static IP and add extra IPs on a Linux VPS (Netplan and nmcli)
Set a static IPv4 address, gateway and DNS, and add additional IPs on Ubuntu with Netplan or on AlmaLinux and Rocky with NetworkManager (nmcli).
Fix "HTTP error" and failed image uploads in WordPress
Fix WordPress media uploads that fail with "HTTP error", "exceeds the maximum upload size" or "unable to create directory": limits, permissions, image libraries and plugins.
Set up email forwarders and the default address in cPanel
Forward one address or a whole domain in cPanel, set the default (catch-all) address, pipe mail to a script and avoid SPF failures when forwarding to Gmail or Outlook.
Run Hyper-V, WSL2 or Docker Desktop inside a Windows VPS on KVM
Why Hyper-V, WSL2, Docker Desktop and Windows Sandbox fail on most Windows VPSs, how nested virtualization on the KVM host fixes it, the host and guest settings needed, and alternatives.
Getting started with WHMReseller on a master reseller plan
What WHMReseller is, how alpha, master and normal resellers relate, where to find it in WHM and the first settings to check on an MdmHost master reseller plan.
Manage the mail queue on Exim and Postfix from the command line
Command-line reference for viewing, inspecting, retrying and deleting queued messages on Exim and Postfix servers, finding the cause of deferrals and spotting spam floods.
Manage database servers in Plesk: local, remote, MariaDB and PostgreSQL
Add local or remote MySQL, MariaDB and PostgreSQL servers in Plesk, set the default database server, change the admin password and upgrade MariaDB safely.
Virtualmin: manage email, DNS and SSL for virtual servers
Day-to-day Virtualmin work on a Linux VPS: create mail users, edit DNS records in the zone, and request a Let's Encrypt certificate for each virtual server.
Sell in multiple currencies with WHMCS
Add currencies in WHMCS, set exchange rates and automatic updates, enter product and domain prices per currency, and handle gateways that only accept some currencies.
How to fix ERR_EMPTY_RESPONSE
ERR_EMPTY_RESPONSE means the server closed the connection without sending any data. Learn the causes, from PHP crashes and security rules to local network issues, and how to fix it.
Update or upgrade WHMCS safely (automatic and manual)
Back up, check compatibility and update WHMCS with the automatic updater or a manual upload, then verify modules, themes and the cron, and recover from a failed upgrade.
NVMe vs SSD vs HDD: what storage type means for your server
Understand the difference between HDD, SATA SSD and NVMe storage, why NVMe speeds up databases and boot times, and what disk speed means for a server day to day.
DNS over HTTPS and DNS over TLS explained
How DoH and DoT encrypt DNS lookups, how they differ from DNSSEC, browser and OS support, using them on a Linux server with systemd-resolved or Unbound, and the trade-offs.
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