Four competence areas with proven track records. Each one shows a concrete scenario and the end result – no marketing speak, just what you will hold in your hands after the project.
Competence area · 01
Proxmox VE
Building, hardening and operating virtual environments based on Proxmox Virtual Environment – from a single node to an HA cluster.
Typical scenario
You run critical applications on a single virtualisation node that offers no failover. A disk fails and your business stands still. We replace the single installation with a three-node cluster featuring replicated storage, HA failover and automated backups.
What you end up with
Three-node cluster with Proxmox VE and Ceph replication
High availability: if a node fails, VMs and containers restart on another node
Proxmox Backup Server with incremental, deduplicated backups
Update pipeline and documented restore procedure
Proxmox VE 9CephProxmox Backup Server
Competence area · 02
VMware to Proxmox migration
A structured migration away from VMware ESXi – no lock-in, no licence traps, no big-bang risk.
Typical scenario
Your existing VMware environment runs, but the licensing model has become impossible to plan – every socket, every VM option costs extra. We migrate your production VMs to Proxmox step by step, starting with non-critical systems and validating the process before production workloads move.
What you end up with
Inventory of all VMs, networks and storage configurations
TCO comparison over 1, 3 and 5 years – in writing, with numbers
Pilot migration of a test system as proof of feasibility
Wave-by-wave execution during ongoing operation, with clearly agreed maintenance windows
Handover including training for your internal IT
Proxmox VEmigration scripts
Competence area · 03
Grommunio
Open-source groupware – mail, calendar, contacts, tasks. A full replacement for Microsoft Exchange, without Microsoft licensing.
Typical scenario
Your Exchange licence is expensive, mobile sync is limited, and moving to Exchange Online is out of the question for privacy reasons. We set up Grommunio behind your existing domain, migrate the mailboxes and provide ActiveSync for iOS and Android – including an MDM-ready configuration.
What you end up with
Provisioning of mail, calendar, contacts, tasks and notes
Fully functional ActiveSync (EAS) for iOS and Android
Integration with Active Directory or OpenLDAP
IMAP/SMTP for Thunderbird, Apple Mail and Outlook
Migration of existing mailboxes from Exchange, MDaemon, Zimbra or IMAP servers
GrommunioOpenLDAP / AD
Competence area · 04
SMS Gateway
Reliable SMS alerting for your systems – even when email and push fail but your on-call staff still have to react.
Typical scenario
Your systems have to raise the alarm reliably when something breaks – but emails go unread and push notifications get overlooked on the duty phone. We connect your existing monitoring to an SMS gateway – via GSM modem for maximum independence or via HTTP to a provider of your choice.
What you end up with
Integration with Zabbix, Checkmk or other monitoring systems
GSM modem or HTTP SMS gateway, configured and ready for operation
Escalation chains: who is notified, when, and how often
Quota management and recipient lists with permissions
Documentation for handover to your IT
Zabbixsmstools / gammu
Enterprise stack
The complete software stack for your company
From firewall to monitoring: every building block a company needs – self-hosted, perfectly matched and run by a single partner.
01
Communication & collaboration
E-mail, calendar, files and office documents – for the whole team, from mobile to desktop.
GrommuniomailcowNextcloudActiveSync
02
Identity & management
One central account per employee: logins, devices and permissions in one place.
Samba ADOpenLDAPSSO
03
Databases
The foundation for business applications, websites and internal tools.
PostgreSQLMariaDB
04
Backup & disaster recovery
Automated backups along two routes – an outage is not data loss.
Proxmox Backup ServerResticOff-site copy
05
Network & security
Firewall, VPN for home office and field staff, clean network segmentation.
pfSenseWireGuardVLANsFail2ban
06
Virtualisation & operating systems
The substructure: virtualised servers on Proxmox with proven Linux systems.
Proxmox VEDebianUbuntuSUSE
07
Operations & alerting
We see when something goes wrong – and get an SMS before your customers notice.
ZabbixSMS alerts
Process
What working with us looks like
From the first phone call to the handover – every step is clear, every step is reversible.
01
Intro call
30 minutes online via video call or phone. You describe your situation, I ask questions. You then receive an honest assessment – even if I am not the right person for the job.
02
Assessment
Remote session: I review your environment, document the current state and record what works and where the risks are.
03
Concept & quote
You receive a written concept with goals, stages, effort estimates and a fixed-price option – before anything is implemented.
04
Implementation
In clearly defined stages, with regular check-ins. Maintenance windows are agreed with you, downtime avoided wherever possible.
05
Handover
Documentation, a short briefing for your IT and an operations manual. You can then run the environment yourself – or hire me to do it.
Got a concrete situation?
Write to us briefly about what's coming up. In the intro call we will tell you honestly whether we can help – and if not, who to turn to instead.
