Guides from the NOC

Outlook or Thunderbird stuck on 'Searching for your mail server settings'? Fix cPanel autodiscover and autoconfig so mail clients set up email automatically.

Choosing an OS for your VPS? Compare Ubuntu, AlmaLinux, and Debian on cPanel support, package management, and update cycles before you provision your server.

Node, PM2, or code-server throwing ENOSPC: System limit for number of file watchers reached on your VPS? Fix the fs.inotify.max_user_watches limit for good.

AutoSSL or Certbot can't validate your domain? Learn why .well-known/acme-challenge gets blocked and how to fix it on cPanel, Nginx, and Apache.

PHP throwing 'headers already sent'? Learn the real causes -- BOM, stray whitespace, early output -- and how to fix it for good in WordPress or cPanel.

Site crawling or throwing 502s under traffic? Learn how to calculate pm.max_children and pick dynamic vs ondemand vs static PHP-FPM on your VPS.

cPanel Exim rejecting outbound mail with 'relay access denied'? Learn why it happens and how to fix envelope sender, SMTP auth, and ACL issues.

cPanel Roundcube webmail stuck blank or rejecting your password? Learn the real causes — quota, cache, login format — and fix each one step by step.

Favicon stuck showing an old or blank icon in WordPress? Learn the real causes: browser cache, CDN, and Site Icon conflicts, and fix each one step by step.

Slow WordPress or app on your VPS even with low CPU? Tune innodb_buffer_pool_size, max_connections, and tmp_table_size in my.cnf the right way.

VPS throwing 'fork: retry: Resource temporarily unavailable'? Learn how nproc/ulimit -u limits work and how to diagnose, raise, and prevent them safely.

Lock a folder with cPanel Directory Privacy the right way. Fix login loops, caching conflicts, and .htpasswd path errors that break Basic Auth.

Site suddenly showing 'Deprecated:' or 'Warning:' text above your header after a PHP upgrade? Here's why it happens and how to fix it properly in cPanel.

Custom post type archive or single pages 404 in WordPress while regular posts work fine? Here's the real cause and the fix, from rewrite rules to plugin swaps.

Getting a 403 Forbidden error? Learn every real cause - ModSecurity, hotlink protection, IP blocks, CDN rules, permissions - and how to fix each one.

AWStats, Webalizer, and Google Analytics all show different visitor counts for the same site. Learn why, and how to fix and read cPanel's traffic stats corre...

Fix WordPress Application Passwords returning 401 or 501 errors on REST API calls, from stripped Authorization headers to disabled HTTPS setups.

Install Memcached on your VPS, wire it into PHP sessions, and fix Connection Refused and Class Memcached Not Found errors while keeping port 11211 secure.

Learn how cPanel's IP Blocker actually works, how to block or allow specific visitor IPs, and why it fails behind Cloudflare or with rotating bot traffic.

Seeing a 414 Request-URI Too Long error? Learn why redirect loops, plugins, or query strings blow past Nginx/Apache URL limits, and how to fix each cause.

Adding a second language to WordPress? Compare WPML vs Polylang, fix broken switchers and duplicate content, and set up translation the right way.

Install Elasticsearch on a VPS the right way: fix the vm.max_map_count bootstrap error, size the JVM heap correctly, and lock down access before going live.

Upgrading MySQL or MariaDB on your VPS? Follow this backup-test-upgrade checklist so WordPress, WooCommerce, or your app doesn't break after the update.

Getting an SSL warning for mail.yourdomain.com in Outlook or Thunderbird? Learn why the certificate name mismatch happens in cPanel and how to fix it for good.