Hosting Provider -- FreeBSD Jail Isolation for Multi-Tenant Infrastructure
Challenge
Regional hosting provider running customer workloads on shared Linux servers with container sprawl. No hard isolation between tenants, recurring noisy-neighbor problems, and a security incident where one compromised account accessed another tenant's data.
Solution
- Migrated infrastructure to FreeBSD with jail-per-tenant isolation
- ZFS datasets per jail with quota enforcement and snapshot scheduling
- VNET jails with per-tenant network stacks and pf firewall rules
- Automated jail provisioning via shell scripts and ezjail
- Resource limits via RCTL for CPU, memory, and disk I/O per tenant
- Centralized log aggregation from all jails to host system
Outcome
A regional hosting provider with roughly 150 shared-hosting customers contacted us after a tenant isolation failure exposed customer data across accounts. Their existing Linux container setup lacked hard process and filesystem boundaries between tenants. Over 8 weeks, we rebuilt their infrastructure on FreeBSD using VNET jails with per-tenant ZFS datasets, RCTL resource limits, and automated provisioning through ezjail. Each tenant now operates inside a fully isolated jail with its own network stack and storage quota. Since the migration, the provider has scaled past 200 production jails with zero cross-tenant security incidents and new customer onboarding takes under 5 minutes from order to live environment.
Financial Services Firm -- FreeBSD Security Hardening for PCI Compliance
Challenge
Fintech company processing payment data needed PCI DSS Level 1 certification. Existing Linux infrastructure had inconsistent security controls, shared root access across services, and no formal network segmentation or audit logging.
Solution
- Rebuilt production environment on FreeBSD with jail isolation per service
- pf firewall with strict ingress/egress rules and network segmentation
- ZFS encryption for data at rest across all storage pools
- Centralized audit logging via FreeBSD audit(4) framework
- SSH key-only access with MFA enforcement and per-user jails for admin access
- Automated FreeBSD security patch pipeline via freebsd-update and custom scripts
- securelevel(7) configured to prevent kernel module loading in production
Outcome
A mid-size fintech company processing credit card transactions needed to pass PCI DSS Level 1 certification but had failed a preliminary assessment due to weak network segmentation, shared administrative access, and gaps in audit logging. We spent 10 weeks rebuilding their production environment on FreeBSD, isolating each service into its own jail, enforcing strict pf firewall rules between network zones, and enabling ZFS encryption across all storage pools. The FreeBSD audit(4) framework gave their compliance team complete visibility into every administrative action and data access event. They passed their PCI audit on the first formal attempt, and in the 24 months since, the environment has logged zero security incidents while maintaining a mean detection time under 3 minutes for anomalous activity.
Media Company -- ZFS Storage Architecture for Content Delivery
Challenge
Digital media company storing 80TB+ of video and image assets on a legacy NAS with no redundancy. Regular data corruption, 6-hour backup windows causing performance degradation, and no point-in-time recovery capability.
Solution
- Designed FreeBSD storage servers with ZFS mirror+stripe (RAID10) pools
- ZFS snapshots every 15 minutes with 30-day retention via automated rotation
- ZFS send/receive replication to offsite backup server
- L2ARC SSD caching for frequently accessed media assets
- ZFS compression (lz4) reducing storage footprint by 35%
- nginx serving directly from ZFS with sendfile optimization
Outcome
A digital media company managing over 80TB of video and image assets was running on a legacy NAS appliance with no redundancy and no point-in-time recovery capability. Nightly backup jobs consumed 6-hour windows and degraded production performance, and the team had already experienced several silent data corruption events. Over 6 weeks, we designed and deployed FreeBSD storage servers using ZFS mirror-stripe pools with 15-minute snapshot intervals, lz4 compression, and L2ARC SSD caching for hot assets. ZFS send/receive replication to an offsite server replaced the slow backup windows entirely. The result was a 35% reduction in raw storage consumption, a 3x improvement in read throughput for their content delivery layer, and a 15-minute recovery point objective that the previous system could never approach.
University Research Lab -- bhyve Virtualization for Compute Workloads
Challenge
University research department running compute workloads across a mix of aging VMware ESXi hosts with expired licenses. Researchers needed Linux, Windows, and FreeBSD VMs on demand, but the budget for commercial hypervisor licensing was eliminated.
Solution
- Migrated to FreeBSD hosts running bhyve hypervisor -- no per-socket licensing
- ZFS-backed VM storage with per-VM datasets and snapshot-based cloning
- vm-bhyve management framework for simplified VM lifecycle
- VNET bridging for VM network isolation with pf traffic shaping
- Automated VM provisioning scripts for researcher self-service
- CARP failover between two physical hosts for high availability
Outcome
A university research department was running computational workloads across a cluster of aging VMware ESXi hosts with expired licensing. Researchers needed on-demand access to Linux, Windows, and FreeBSD virtual machines, but the department had lost its budget for commercial hypervisor renewals. Completed in 3 months, we migrated their entire VM fleet to FreeBSD hosts running bhyve with ZFS-backed storage per VM and CARP failover between two physical servers. Researchers can now clone a fresh VM from a ZFS snapshot in under 30 seconds using self-service provisioning scripts. The environment currently runs over 60 production VMs at 99.9% uptime with zero ongoing licensing costs, freeing the department's budget for actual research hardware.
E-Commerce Platform -- nginx Performance Tuning on FreeBSD
Challenge
High-traffic e-commerce site on Linux serving 15K concurrent connections. Frequent 502 errors during flash sales, PHP-FPM worker starvation, and TLS handshake latency exceeding 200ms. The team was considering expensive CDN upgrades.
Solution
- Migrated web tier to FreeBSD with kqueue-optimized nginx build
- Tuned FreeBSD kernel: increased kern.ipc.somaxconn, net.inet.tcp.sendspace/recvspace
- nginx worker_connections tuned to 8192 with accept_mutex off
- PHP-FPM pool tuning with dynamic process management and ondemand fallback
- TLS session tickets and OCSP stapling for sub-50ms handshakes
- ZFS-backed static asset serving with ARC caching
Outcome
A high-traffic e-commerce platform serving around 15,000 concurrent connections was experiencing frequent 502 errors during flash sale events. PHP-FPM workers were starving under load, TLS handshake latency exceeded 200ms, and the engineering team was weighing an expensive CDN contract to compensate. Over 4 weeks, we migrated their web tier to FreeBSD with a kqueue-optimized nginx build, tuned kernel network parameters, restructured PHP-FPM pool management, and implemented TLS session tickets with OCSP stapling. The platform now handles 50,000 concurrent connections without 502 errors, TLS handshakes dropped to 38ms, and page load times improved by 70 percent -- all without the CDN expenditure they had been planning.
Every FreeBSD engagement is different. We tailor our approach to your specific infrastructure challenges, performance requirements, and security posture.
These case studies represent a sample of our FreeBSD work. Schedule a consultation to discuss how FreeBSD can solve your infrastructure challenges.