System requirements

Server

All required components have to be installed and configured at the agreed time
of installation of CRM+.
Before the installation, the server is checked. If this is not faultless,
the installation will not be carried out and a new appointment must be
agreed.
Furthermore, we point out that the provided system requirements are subject
to change at any time with the further development of CRM+.

Platform	Options
Operating System	Debian 11 (bullseye) amd64 (w/o GUI)
Database	MariaDB 10.5.x
Webserver	Apache 2.4.x with `mod_php`
PHP Runtime	8.1.x

Warning

There is no guarantee for a proper functioning on other distributions.

Hardware requirements

componente	description
processor	min. Quad core processor 2.0 GHz (recommend 3.6 GHz or higher)
RAM	min. 8 GB RAM (recommend 16GB)
hard disk	at least 100 GB for CRM+ (including file upload)

Software requirements

package	description
git	2.30.x or higher
curl	7.26.x or higher
tmux	Terminal multiplexer for the command line. Protection for session timeout and aborts.

Additionally Recommended Packages

package	description
lynis	System Check Tool (providing suggestions about configuration errors, vulnerabilities, etc.). Call via: `lynis -c`
etckeeper	Keep track of `/etc` in a repository. Optional configure git: `git -C /etc config --global user.name <your-name>` `git -C /etc config --global user.email <your-email>`
unattended-upgrades	Automatically install security updates. For reconfiguration call the following command and submit with <yes> `dpkg-reconfigure -p low unattended-upgrades`

Required Access for InHouse

VPN

If a VPN is used, the VPN must be an OpenVPN compatible one.

Server

Server	Access for administration of CRM+ (Installation & Updates)
Database	Access for administration of the CRM+ database (installation & updates)
HTTP	Access to CRM+ via browser (HTTPS recommended)

Note

These additions do not have to be permanently available as they are only needed for installation or maintenance of CRM+.

The accesses can be locked after completion of the maintenance work With “InHouse SSA” no accesses are needed! The following ports are required for installation in / out:

SSH: communicated personally
Git: communicated personally
Composer: 4680
Web: 443

Hint: InHouse SSA = InHouse Single-Side-Access

Communication with the delivery server takes place exclusively via ssh with a key pair (private / public key). Please create a key pair for a user with whom you will work.

Example (for root):

# Create SSH keypair
$ ssh-keygen -t ED25519 -C "inhouse@<Projectname>"

following you will find 2 files under:

# In the home directory
$ ~/.ssh/id_ed25519
$ ~/.ssh/id_ed25519.pub

Please send us the file “id_ed25519.pub!”

Web browser

Chrome	Firefox	Safari	Edge
current - 3 versions	current - 3 versions	current - 2 versions	current - 3 versions

Note

Explanation: current - 3 versions means that the mentioned browser in the latest version, as well as in the three previous versions are supported.

If e.g. a browser is available in the latest version 24, versions 24.x, 23.x, 22.x and 21.x are supported.