Administration of VMs and LXC
Launching virtual machines and LXC containers, creating machine templates, snapshots, and much more.
Networking
Building virtual networks including VLANs, OpenvSwitch, Virtual DNS and DHCP, bonded interfaces (bonding), etc.
Backup and replication
Backing up machines using built-in functions or through the terminal, live migration to another server, snapshots, machine cloning. Also, dedicated backup system - Proxmox Backup Server.
Monitoring and Optimization
Monitoring machines including live charts of resource usage and many other interesting solutions facilitating work through Zabbix monitoring.
Automation and security
Utilizing built-in firewall and authorization tools like 2FA, hardening, OS security. Using Ansible for automating certain tasks.