Requirements for the NexCMP server
This page covers the server that runs NexCMP. What your CloudStack, Proxmox VE or other infrastructure needs is in Infrastructure requirements.
Server
| Item | Requirement | Checked by the installer |
|---|---|---|
| Operating system | Ubuntu 22.04 or 24.04 | Yes — stops with an error on anything else |
| CPU architecture | x86_64 | Yes |
| Memory | 2 GB minimum (the installer refuses less than about 1.8 GB) | Yes |
| Free disk | 8 GB free on / minimum | Yes |
| Privileges | root (sudo) | Yes |
| Packages | curl, ca-certificates, zstd, tar, openssl, python3, openssh-client — installed automatically | Installed if missing |
| With HTTPS | nginx and certbot — installed automatically unless you pass --no-nginx | Installed if missing |
Sizing
A small installation (a few hundred customers) runs comfortably on 2 vCPU / 4 GB RAM. Disk use is dominated by the SQLite databases and the optional update and backup copies — plan 20 GB or more for production.
Network
| Direction | Port | Purpose |
|---|---|---|
| Inbound | 80/tcp | Let's Encrypt validation and redirect to HTTPS |
| Inbound | 443/tcp | Customer portal, admin console, API |
| Inbound | 3000/tcp | Setup wizard on first install and emergency access only — see Installation |
| Outbound | 443/tcp to nexcmp.com | License activation, daily license check, updates |
| Outbound | to your CloudStack API / Proxmox API | Provisioning and synchronisation |
| Outbound | 443/tcp to payment, e-mail and AI providers you enable | Stripe, PayPal, SMTP, AI provider and so on |
The server needs a public IPv4 address if you want Let's Encrypt to issue a certificate directly. If the domain is proxied by Cloudflare, see DNS and Cloudflare.
DNS
- One main domain (for example
cloud.example.com) — the portal ishttps://cloud.example.com/and the admin console ishttps://cloud.example.com/admin. - Optional:
admin.<domain>andpartner.<domain>. If those names resolve to the server (or to Cloudflare), the installer adds them to the certificate. - The domain must match the one registered on your license.
Not required on this server
NexCMP runs as an ordinary unprivileged service user (nexcmp). It does not need root at runtime, Docker, a separate database server, Redis, or any hypervisor software.