Texas Server Systems can build Windows based servers but is proud to support Linux based servers and software builds including but not limited to:

Debian, CentOS, RedHat Linux server builds.
All Linux builds include standard firewall configuration with specific ports open based on requirements.
Secure server builds available.

pfSense firewall installations
Plex Media Server
OpenMediaVault NAS
NextCloud
XenServer
VMWare

PoE or Wireless Security Cam installation + Configuration including iPhone or Android cam remote viewing, DVR recording, audio recording.

...more

Email for your requirements.