Shield: The Firewall Built for Real Business
Built by engineers. Trusted by UK businesses. Managed by people who care.
Shield is a hardened, cloud-managed firewall that actually protects your business — no guesswork, no vendor bloat, no forgotten rules.
Most firewalls fail silently.
They’re installed, misconfigured, and left to rot. Nobody checks them. Nobody maintains them. And when an attack hits, they’re just in the way — not in control.
Shield is different.
Pre-configured by security engineers
No more default rules or guesswork. Every Shield unit ships locked down, hardened, and ready to go.
Managed in the cloud — by us
We keep it updated, monitored, and secure. No dashboards. No fiddling. Just results.
Built for real business risk
Shield blocks ransomware, isolates guest networks, and stops breaches at the edge — before they become headlines.
What Shield Protects
Your staff, tills, printers, Wi-Fi — everything behind the router. Shield separates and locks it down, so a mistake in one area doesn’t take down the rest.
Who Shield is For
- ✔️ Small businesses who want real security without complexity
- ✔️ Shops and offices that use tills, card machines, or work devices on shared Wi-Fi
- ✔️ Anyone who’s been burned by bad MSP support or tech upselling
- ✔️ Companies working toward Cyber Essentials compliance
Under the Hood
Shield isn’t just some plastic router. It’s a hardened, Intel-powered appliance running open-source tech trusted by pros worldwide.
🔧 Hardware Specs
- Intel N100 (4-core, fanless)
- 8GB DDR4 RAM
- 128GB NVMe SSD
- 4x Intel i225-V NICs (2.5GbE)
- Silent, low-power build
🧠 Software Stack
- Runs OPNsense — open-source and hardened
- Cloud-managed by Sentryn
- Encrypted config backups
- No vendor lock-in or mystery settings
- Hardened by default, monitored in real time
🌍 Trusted in the Field
- ✅ SecureDrop (Freedom of the Press Foundation) – used to protect journalist sources
- ✅ Formula 1 Team (undisclosed) – used for specific network segmentation tasks
- ✅ German SMB & ex-ISP – migrated full stack to OPNsense from proprietary systems
- ✅ MSPs across Europe – citing transparency, reliability, and no licensing bloat
How Shield Compares
🛑 Typical “Next-Gen” Firewall
- £1,000+ upfront hardware cost
- Ongoing license/subscription traps
- Bloated dashboards nobody monitors
- Misconfigured by rushed MSP installs
- Inconsistent updates and rule hygiene
✅ Sentryn Shield
- £799 one-time cost — no license trap
- Runs OPNsense — open, proven, secure
- Pre-hardened and fully configured
- Cloud-managed by engineers who care
- Built for compliance and real attacks
Want a firewall that actually protects you?
Let us install Shield, lock it down, and keep it that way — so you can focus on running your business, not chasing threats.
Book a Free Audit