The server is the heart of every infrastructure, but not every server is the same. A web server benefits above all from fast storage and good network connectivity, while a database server needs plenty of memory and fast disks, because data is constantly being read and written there. An application server, on which your software runs, depends on CPU power instead. These roles can share one machine or be separated, virtualized or dedicated. Together we find the right split, then the operating system and services are set up and kept up to date.
Instead of running a separate machine for every service, most servers run virtualized, depending on the environment on VMware, Citrix, Hyper-V or Proxmox. This makes better use of the hardware, new systems are ready faster, and for maintenance virtual machines can be moved to another host without downtime. Before larger changes, a snapshot additionally preserves the previous state, so there is always a way back. Where it makes sense, individual systems or load peaks can be moved to the cloud, for example to Microsoft Azure, without you having to migrate your entire infrastructure.
The firewall sits between your infrastructure and the internet and decides which traffic gets through. Without it, every server would be directly reachable with all of its services, an open door for automated attacks. That is why devices from Fortinet and Palo Alto are used, letting through only what you really need. So your team can also work securely on the road, there are VPN connections, and where it makes sense the network is additionally split into segments, so a compromised system cannot reach all the others.
A backup is only worth something if it can be restored when it counts, and that is exactly where things often fail in practice. That is why your backups run automatically with Veeam or Commvault, and an additional copy is kept at a second, physically separate site. This way, neither a hardware failure nor a ransomware attack at the main site takes everything from you at once. Whether restoring works is tested regularly, not only when things are on fire.
Besides backup, there is often a need for additional storage, for example for archives, large amounts of data or a shared repository for several systems. This storage runs separately from your production servers, so your data stays reachable even if a single server fails.
Without segmentation, every system can talk to every other one, even when that is neither necessary nor intended. That is why VLANs divide your network into separate zones following the principle of micro-segmentation, where systems only communicate where it makes sense. In an emergency, this limits how far an attack can spread and also creates clarity. As your environment grows, new systems and sites are simply added, without you having to deal with switch configuration yourself.
Most IT problems announce themselves before an outage, for example when a service responds more slowly, a disk fills up or a certificate expires in two weeks. Zabbix monitors your systems continuously and raises an alarm automatically as soon as something looks unusual. This often makes it possible to step in before you notice anything at all.