02 / Service

FreeBSD, BSD, Linux & Unix Systems Engineering

FreeBSD systems engineering covers the design, deployment, hardening, and management of production FreeBSD servers. We provide expert administration across FreeBSD, OpenBSD, NetBSD, and Linux -- specializing in jail isolation, ZFS storage, pf firewalls, DTrace profiling, and kernel tuning for high-performance environments serving millions of requests.

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Supported Platforms

Cross-Platform Unix Expertise

BSD Variants
FreeBSD OpenBSD NetBSD HardenedBSD ZFS-Native
Linux Distributions
Ubuntu Server Debian RHEL AlmaLinux Rocky CentOS Amazon Linux Custom Minimal
Unix Platforms (Legacy & Enterprise)
Solaris Illumos AIX macOS Server
01 / Capability

System Architecture & Build Engineering

Greenfield Deployments

  • Secure OS installation and baseline hardening
  • Filesystem layout design (ZFS, UFS, ext4, XFS)
  • Swap and memory architecture planning
  • Secure SSH baseline
  • Minimal attack surface configuration
  • poudriere custom package builds and private repository management
  • FreeBSD CURRENT/STABLE branch tracking and source-based upgrades (freebsd-update, buildworld/buildkernel)

Nginx Engineering

  • Custom Nginx builds (GeoIP2, HTTP/2/3, TLS optimization, module selection)
  • High-concurrency event-driven architecture tuning
  • Reverse proxy & load balancing configuration
  • FastCGI and upstream performance optimization
  • Advanced caching strategy design (microcaching, proxy_cache)
  • Rate limiting & traffic shaping configuration
  • TLS hardening & cipher suite optimization
  • Zero-downtime reload & deployment strategy
  • Compile-time optimization & minimal attack surface builds

Apache HTTP Server Engineering

  • Custom Apache builds (module selection, TLS hardening)
  • MPM optimization (event, worker, prefork modeling)
  • Reverse proxy & load balancing configuration (mod_proxy, mod_ssl)
  • High-concurrency performance tuning
  • PHP integration strategies (mod_php vs PHP-FPM)
  • Module hardening & attack surface reduction
  • Legacy workload stabilization & modernization

Large-Scale Architecture

  • Multi-tier web/application/database clusters
  • Load-balanced environments
  • Web clusters, API clusters, Redis clusters
  • Dedicated database tiers
  • High-availability failover designs
FREEBSD HOST FreeBSD 14.x pf FIREWALL packet filtering / NAT / rate limiting / traffic shaping VNET per-jail virtual network stack / isolated routing tables Web Jail nginx + PHP-FPM TLS termination static assets reverse proxy epair0a / 10.0.0.2 DB Jail MySQL / PostgreSQL InnoDB buffer pool replication binary logs epair1a / 10.0.0.3 App Jail application logic API services queue workers cron jobs epair2a / 10.0.0.4 Mail Jail Postfix / Dovecot DKIM signing spam filtering IMAP/SMTP epair3a / 10.0.0.5 RCTL per-jail resource limits: CPU / memory / max processes / disk I/O ZFS DATASETS zroot/jails/web zroot/jails/db zroot/jails/app zroot/jails/mail
FreeBSD jail architecture: isolated workloads with per-jail ZFS datasets, VNET networking, and pf firewall rules
02 / Capability

Filesystems & Storage Engineering

  • ZFS design (pools, datasets, ARC tuning)
  • Snapshot and replication strategy
  • RAID design and rebuild management
  • Disk I/O performance tuning
  • NVMe optimization
  • LVM configuration (Linux)
  • Cross-datacenter replication
  • Backup verification automation
  • GEOM-based disk management (striping, mirroring, encryption with geli, journaling)
03 / Capability

Network Engineering & Services

  • TCP/IP stack tuning
  • Firewall architecture (pf, nftables, iptables)
  • DDoS mitigation design
  • Reverse proxy engineering
  • HAProxy and Nginx/Apache, PHP, API, CDN load balancing
  • BGP integration (where required)
  • VPN architecture (WireGuard, IPSec, OpenVPN)
  • DNS infrastructure (authoritative & recursive)
  • Anycast design concepts
  • pf tables, anchors, and ALTQ traffic shaping for FreeBSD firewalls
  • VNET jail networking with per-jail virtual network stacks
04 / Capability

Performance Engineering & Optimization

  • CPU bottleneck analysis
  • Memory pressure diagnostics
  • Disk I/O deep analysis
  • Network packet capture & troubleshooting (tcpdump)
  • Kernel tuning (sysctl optimization)
  • PHP-FPM pool optimization
  • MySQL tuning (buffer pools, indexing strategy)
  • Slow query analysis
  • High-concurrency workload tuning
  • DTrace probes for live kernel and application performance analysis
05 / Capability

Security Hardening & Compliance

  • SSH lockdown & key-only enforcement
  • Jail/chroot isolation
  • Intrusion detection deployment
  • Automated IP blocking frameworks
  • Log monitoring & anomaly detection
  • CIS-aligned hardening
  • Patch lifecycle management
  • Access control policies
  • Secrets management integration
  • Capsicum capability mode for fine-grained process sandboxing on FreeBSD
06 / Capability

Virtualization & Isolation

  • FreeBSD jails
  • bhyve
  • KVM
  • VMware
  • Containerized workloads (Docker)
  • Resource isolation and quotas
  • Secure multi-tenant architecture
  • rctl resource limits for jail CPU, memory, and process control
  • VNET jail networking with dedicated virtual interfaces and routing
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Monitoring, Logging & Reliability Engineering

  • 24/7 monitoring architecture
  • Monit-based automation
  • Prometheus & Grafana dashboards
  • Custom alerting logic
  • Log aggregation systems
  • SLA & SLO definition
  • Capacity planning & growth modeling
  • Proactive failure detection
  • Automated remediation scripting
  • newsyslog.conf log rotation and compression management on FreeBSD
08 / Capability

Automation & Systems Scripting

  • Advanced Bash engineering
  • Shell-based orchestration frameworks
  • AWK / sed / grep pipelines
  • Cron fleet management
  • Self-healing scripts
  • Log parsing engines
  • Domain & SSL automation
  • Certificate lifecycle automation
  • Server provisioning automation
  • periodic(8) daily/weekly/monthly task orchestration on FreeBSD
09 / Capability

Database Infrastructure Engineering

  • Dedicated MySQL server architecture
  • Replication (primary/replica)
  • Partitioned table strategy
  • Monthly growth tracking systems
  • Binary log management
  • Backup and restore testing
  • Storage forecasting
  • Query performance engineering
10 / Capability

Migration & Recovery Engineering

  • Legacy server migrations
  • FreeBSD version upgrades
  • Linux major-version upgrades
  • Cross-platform migrations (Linux to BSD, BSD to Linux)
  • Datacenter moves
  • Zero-downtime migration planning
  • Disaster recovery simulations
  • Emergency recovery execution
11 / Capability

Operational Leadership

  • 24/7 production incident response
  • Runbook creation
  • Change management discipline
  • Infrastructure documentation
  • Cost-aware engineering decisions
  • Vendor coordination
  • On-call architecture design
12 / Capability

Advanced Capabilities

  • GeoIP-based access control
  • Country-level traffic engineering
  • Custom traffic filtering engines
  • High-volume log processing
  • Automated abuse mitigation
  • Email infrastructure (Postfix, Dovecot)
  • SSL termination clusters
  • High-volume domain management automation

With 55+ years of combined Unix and FreeBSD experience and over 20 years operating in production cloud environments, we design, build, harden, automate, and operate FreeBSD infrastructure at scale -- from jails and ZFS to DTrace, pf, bhyve, and poudriere.

From single-instance FreeBSD deployments to multi-region clustered systems, we engineer reliability, performance, and security from the kernel up.

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FAQ

Frequently Asked Questions

What is FreeBSD systems engineering?

FreeBSD systems engineering is the discipline of designing, building, and maintaining production servers running the FreeBSD operating system. This includes architecture planning, installation and configuration, performance tuning, security hardening, storage management with ZFS, workload isolation with jails, firewall configuration with pf, and ongoing administration. It requires deep knowledge of the FreeBSD kernel, userland tools, ports system, and the specific ways FreeBSD differs from Linux.

Is FreeBSD still used in production?

Yes. FreeBSD runs some of the largest-scale infrastructure in the world. Netflix uses FreeBSD for its Open Connect CDN serving terabytes of traffic per second. WhatsApp ran its messaging infrastructure on FreeBSD. Sony uses it in the PlayStation operating system. It is widely used in network appliances, storage systems, hosting providers, and organizations that value stability, performance, and a permissive license.

Can you manage mixed FreeBSD and Linux environments?

Yes. Many of our clients run FreeBSD alongside Linux in the same infrastructure. We manage both, with tooling that works across platforms -- Ansible for configuration management, Prometheus for monitoring, and shell scripts that target POSIX compatibility. We also help teams evaluate which workloads benefit from FreeBSD versus Linux.

How are FreeBSD jails different from Docker containers?

FreeBSD jails provide OS-level virtualization with stronger isolation than Docker. Each jail has its own filesystem, network stack (with VNET), process space, and resource limits (with RCTL). Unlike Docker, jails do not require a daemon, use a simpler security model, and integrate natively with ZFS for storage and pf for networking. They are more comparable to Linux namespaces plus cgroups, but predate both by over a decade.

Do you handle FreeBSD upgrades and security patching?

Yes. We manage freebsd-update for binary security patches, source-based upgrades for major version migrations, and poudriere-built package repositories for custom software. We test upgrades in staging jails before applying to production, and we maintain rollback capability via ZFS boot environment snapshots at every step.

Ready to evaluate your infrastructure?

Whether you need cloud architecture consulting, FreeBSD and Linux systems engineering, AI automation integration, or full 24/7 infrastructure management -- we can help.

Schedule a Consultation