FreeBSD Administration
FreeBSD Server Administration — PF Firewall, ZFS, Jails & Hardening
FreeBSD is an operating system that has powered some of the most heavily loaded servers in the world for decades — from Netflix, through WhatsApp, to DNS infrastructure and corporate firewalls. We choose FreeBSD where predictable performance, advanced security mechanisms, and reliable data protection matter. The native PF firewall, ZFS filesystem with built-in snapshots, and jails containerization are tools that no Linux distribution offers in such an integrated form. We administer FreeBSD servers in production environments hosting WordPress sites, WooCommerce stores, and custom web applications.
System
FreeBSD Installation & Configuration
We install FreeBSD from scratch on dedicated servers and VPS. We configure ZFS filesystem, networking, bootloader, ports and pkg package repository. We tailor the configuration to application requirements — from simple web servers to complex environments with multiple services running in isolated jails.
PF Firewall
PF Firewall — Filtering, NAT, Rate-Limiting
We configure the native PF firewall — stateful packet filtering, NAT, port forwarding, rate-limiting, SYN flood protection, and packet normalization (scrub). PF stands out with its clean configuration syntax and high performance under heavy network traffic. The configuration is readable, auditable, and easy to maintain.
ZFS
ZFS Filesystem — Snapshots, Compression, Replication
ZFS is FreeBSD's most significant advantage over Linux for data protection. Native snapshots with zero downtime, automatic LZ4/ZSTD compression, checksums on every block, ZFS send/receive replication to a remote server. We use ZFS to create instant filesystem state copies before updates, migrations, and configuration changes.
Jails
Jails Containerization — Service Isolation
FreeBSD jails provide native containerization with full process, filesystem, and network isolation — without the performance overhead of Docker containers. We run services in separate jails: web server, database, mail server, DNS. A compromise of one service does not mean the entire server is compromised. We manage jails using bastille or manually through jail.conf configuration.
Hardening
FreeBSD System Hardening
We secure FreeBSD at the operating system level: securelevel, file flags (schg, sunlnk), disabling unnecessary services, restricting SSH access to keys, security-focused sysctl configuration, and permission auditing. FreeBSD offers native protection mechanisms — securelevel prevents modification of critical system files even by root.
Backup
Backup & Disaster Recovery
On FreeBSD, we combine ZFS snapshots with remote server replication — instant filesystem state copies with zero downtime, encrypted offsite replication. We complement this with traditional database and configuration file backups. Multi-layered strategy: ZFS snapshots every hour, full replication daily, recovery tests monthly.
FreeBSD is an operating system for those who need predictability, stability, and advanced administrative tools available natively — without bolting on external modules and patches. The PF firewall, ZFS filesystem, and jails containerization give the administrator a level of control that no Linux distribution offers in such a cohesive form. We have been administering FreeBSD in production environments for years and know when it is a better choice than Linux.