Proxmox is a popular choice for home labbers due to its low system requirements and free and open-source (FOSS) nature. When setting up a new Proxmox installation, there are several essential settings to enable for optimal performance, security, and manageability.
Firstly, consider enabling the no-subscription repository to receive regular security updates. Additionally, disabling premium counterparts can help prevent errors caused by using outdated packages.
To increase security, configure VLANs (Virtual Local Area Networks) on your Proxmox host. This will isolate vulnerable devices, such as IoT gadgets and smart home appliances, behind a separate network with hardened firewall rules.
Another crucial setting is modifying the CPU scaling governor to reduce power consumption. By switching to the powersave profile, you can lower your energy bills without sacrificing performance.
Setting up notification targets, ideally with an alert server running on a different node, ensures faster recovery in case of server issues.
Lastly, adding a backup device, such as Proxmox Backup Server (PBS), provides solid deduplication, incremental backups, and compression facilities for automated backups of virtual guests.
Source: https://www.xda-developers.com/i-always-change-these-5-proxmox-settings-on-a-fresh-install