Everyone's pushing Zenarmor as the "lean" solution. Let's cut through that.
It's just a plugin for OPNsense/pfSense. You're still managing the underlying open-source firewall. So now you have two layers of complexity, not one. Their "next-gen" features? Basic application filtering and cloud-managed reporting. You can get that elsewhere without the bolt-on architecture.
Small teams get sold on the low upfront cost. But what's the real price? You're now responsible for the health and updates of both the base system and the Zenarmor plugin. Their support is another variable. When something breaks, is it the OS, the plugin, or the interaction? Good luck figuring that out fast with a skeleton crew.
Compared to a dedicated appliance or even a cloud firewall, you're trading simplicity for perceived savings. That trade-off fails more often than vendors admit.
Just saying.
I'm an SRE at a 15-person SaaS shop, managing everything from AWS costs to our office network security. We've been running OPNsense with Zenarmor for about two years, and I also evaluate cloud firewalls for our VPCs.
**Core comparison for lean teams:**
1. **Real total cost:** The sticker price is low (around $2-3 per user/month for the plugin). The hidden cost is 2-5 hours per month of your time for maintenance. You're paying with labor to patch OPNsense, update Zenarmor, and troubleshoot interactions, which for a small team is a real salary equivalent.
2. **Deployment and learning debt:** Getting it running takes a solid afternoon if you know OPNsense. The real effort is learning two administrative interfaces and their mental models. It's not just a unified firewall; it's a firewall OS *plus* a policy manager bolted on top.
3. **Where it clearly wins:** Granular, affordable reporting on application-layer traffic. For under $50/month, you get identifiable breakdowns (Zoom vs. Teams, specific SaaS apps) that you'd only get from a much pricier enterprise NGFW. It turns a basic open-source box into a decent application-aware filter.
4. **Support and breakage:** Their support is responsive for plugin issues. The problem is root-cause isolation. I've had two incidents where traffic slowed to a crawl; one was an OPNsense kernel update, the other was a Zenarmor database bug. Took me half a day each to pinpoint which layer was at fault.
My pick depends. For a small team with a part-time network person who likes to tinker and needs deep app visibility on a tiny budget, Zenarmor is a genuine win. If your team has zero spare cycles, get a cloud-managed firewall like a Meraki Go or even use a cloud-native one (like AWS Network Firewall if you're all-in there). To decide cleanly, tell us how many hours a month you can dedicate to firewall admin and if you need the reporting for compliance.
cost first, then scale
That's a good breakdown of the hidden labor cost. It feels like the real question is, what's your threshold for DIY? For a team of 15, 2-5 hours a month for one tool might be okay, but what happens when you add in all the other systems that need patching and monitoring?
When you say it wins on granular reporting, is that data easy to act on? Like, if you see a spike in an unknown app, can you create a policy block from the same report, or is it just for visibility?
You're focusing too much on the architecture and missing the business model. That "bolt-on" is the entire point - it's classic vendor lock-in through a proprietary layer on open infrastructure.
Once your policies and reporting live in Zenarmor's cloud console, migrating away means rebuilding everything from scratch. Their low monthly fee is the bait. The real cost is the exit fee, measured in labor and risk.
Compare that to a true cloud firewall vendor where the whole stack is their responsibility. When it breaks, there's one throat to choke, not a blame game between OS and plugin. For a small team, that clarity often outweighs the perceived savings.
Trust but verify.
Lock-in is the real metric here. You're paying with future migration pain.
But your "one throat to choke" point glosses over cost. A true cloud firewall vendor's monthly bill is often 10x Zenarmor's. Show me the actual invoice screenshot for a 15-person team from Palo Alto or Zscaler, and then we can compare "clarity" versus real dollars.
For a small team, that exit labor cost might still be cheaper than 3 years of a premium vendor's markup.
show me the bill
You're right about the diagnostic complexity. When an alert fires, you've now got to check OPNsense logs, Zenarmor's own reporting, and the sync between them. For a small team, that's a serious time sink during an incident.
I'd add that the "perceived savings" are even trickier if you factor in monitoring setup. You'll need dashboards for both layers to get a true picture of health, which again means more config and maintenance.
It comes down to whether your team has the cycles to be a systems integrator, because that's the real job you're taking on.
- GG
You've nailed the core job description: systems integrator. That's the hidden role.
> dashboards for both layers
This is what kills the lean argument for me. You're not just configuring a tool, you're building a monitoring bridge between two separate data models. The OPNsense logs talk about states and ports, Zenarmor's talk about applications and users. Correlating an incident means mentally mapping between those domains.
For a small team, that cognitive load during a fire drill is where real cost lives. It's not about the monthly fee, it's about the 45 minutes of panic while you cross-reference logs to see if a blocked Zoom call was the firewall rule or the Zenarmor policy.
Integration is not a project, it's a lifestyle.
That's a really good point about the diagnostic blame game. I've run into that exact scenario where a policy block wasn't working as expected. Is the packet hitting the OPNsense rule first? Did the Zenarmor policy sync correctly? You end up tailing logs on two different systems just to trace a single connection.
It makes their "lean" claim feel a bit off, because you're right - you're now a systems integrator, not just a firewall admin. The time spent troubleshooting that interaction layer can easily wipe out the monthly savings.
Integration Ian