Panellicense
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201 articles on running a hosting business.

Install guides, migration playbooks, troubleshooting, and license maths. Search the whole library or browse by category.

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Rspamd on cPanel: what's actually supported in 2026
cPanel & WHM has no native Rspamd integration — here's what the built-in stack actually is, why community Rspamd-on-Exim setups are risky, and when switching panels is the real answer.
5 min readtroubleshoot
EasyApache 4 25.69: cPanel patches six Tomcat CVEs in ea-tomcat101
EasyApache 4 25.69 ships Apache Tomcat 10.1.56 in ea-tomcat101, closing six CVEs — an auth-bypass on default servlet constraints among them. Here's what's fixed and how to update.
5 min readchangelog
Plesk Obsidian 18.0.79: what's new and why to upgrade now
Plesk Obsidian 18.0.79 opens the REST API to resellers and customers, adds SQL Server 2025 support and an AlmaLinux 8-to-9 upgrade script, and ships a security-audit-driven hardening pass.
6 min readchangelog
Set up JetBackup 5 deduplication backups to cut storage cost
JetBackup 5.4 added a deduplication backup structure that fingerprints data in chunks and stores each unique chunk once — here's how it works, where it pays off, and how to turn it on.
6 min readhow to
Fix JetBackup license errors: invalid, not found, and IP mismatch
Diagnose JetBackup's license validation errors — no license found for this IP, license invalid for current server, and reissue failures — and fix each from WHM or the CLI.
5 min readtroubleshoot
Plesk 360 setup guide for centralized licenses and monitoring
Plesk 360 is the SaaS control plane for everyone running more than one Plesk box — license management, uptime monitoring, and SSO into every panel from one dashboard.
7 min readhow to
InterWorx license tiers explained: VPS vs Dedicated pricing
InterWorx doesn't price by SiteWorx account count like cPanel and Plesk do — it prices by vCPU count and clustering. Here's how the VPS, Dedicated Limited, and Dedicated Unlimited SKUs actually differ.
8 min readpricing
Use the Plesk REST API with reseller and customer accounts
Plesk Obsidian 18.0.79 opens the REST API to reseller and customer accounts and adds file, log, and impersonation endpoints — how to authenticate and use them.
7 min readhow to
CVE-2026-41940: the cPanel & WHM auth bypass, and how to check for it
A CRLF injection in cpsrvd session handling let unauthenticated attackers write user=root into their own session file. Patched versions, IOCs, and how to check if you were hit.
7 min readchangelog
How to move a cPanel license to a new server or IP address
cPanel licenses are bound to a primary IP, not a server. Here's how to repoint one to a new IP after a migration, IP change, or provider swap without downtime.
6 min readhow to
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