If you’re reading this, chances are you’re already familiar with the role IBC Guard plays in safeguarding industrial control systems (ICS) and operational technology (OT) networks—those critical, often aging systems that run everything from power plants and water treatment facilities to manufacturing lines and transportation grids. As a supplier of IBC Guard solutions, I’ve spent the last eight years on the front lines of OT cybersecurity, and one question comes up more often than any other: How do you handle software bugs when those bugs aren’t just a minor inconvenience—they’re a potential threat to life, productivity, and public safety? IBC Guard
The short answer isn’t just “patch the code.” It’s a layered, rigorous process that’s tailored specifically to the unique risks of OT environments, where downtime can cost millions, and updating systems often requires 12+ hours of scheduled maintenance windows. Let me walk you through exactly how our team approaches this, because when it comes to IBC security, bugs aren’t just code errors—they’re vulnerabilities we have to mitigate with a level of care most people don’t realize is required.
First, it’s important to clarify what a “software bug” means in the IBC (Industrial Backup Controller) space. Unlike standard IT software, IBC Guard runs on hardware designed to withstand extreme temperatures, power surges, and physical tampering—hardware that might be 10+ years old. The software is built to be lightweight because it runs on embedded systems, not high-powered servers. So a bug here might not be a crash, but something more insidious: a failure to log a malicious access attempt, a delay in failing over to a secondary system when the primary goes down, or even a misinterpretation of a sensor reading that leads to an incorrect control command.
Our process starts long before a bug is even reported to us. We have a full-time in-house security research team that spends 40+ hours a week dissecting our own IBC Guard code, plus the ICS protocols we interface with (Modbus, DNP3, OPC UA, etc.). We use a combination of static code analysis tools, fuzz testing, and manual penetration testing—all focused on OT-specific edge cases. For example, when we were working on a version that integrated with a new water treatment plant’s SCADA system, our research team found a bug where the IBC would ignore a “shutoff valve” command if it arrived at exactly 12:00 AM on a leap second. That’s the kind of edge case automation tools often miss, but manual testing with real-world OT environments catches. We fix those bugs before they ever reach a customer, which cuts down on post-deployment issues by about 70%—a number we’re proud of, but never satisfied with.
When a bug is reported—either by our own team, a customer, or a third-party security researcher—our next step is triage, and it’s nothing like IT bug triage. We don’t assign a low-priority ticket and come back to it next week. Instead, we have a 24/7 OT security response team that prioritizes bugs based on three factors: impact on OT operations, exploitability, and the length of time the bug has been present in our code. For example, a bug that allows an attacker to take over the IBC’s failover function is Critical, even if it only exists in a beta version; a bug that causes a minor log delay in a system that’s already fully patched is Medium. We also never disclose a bug publicly until we’ve had time to test a fix with affected customers, because OT downtime is non-negotiable.
Once a bug is classified, our engineering team moves into development—but again, not like standard IT. When we build a fix, we have two non-negotiable rules: first, the fix cannot require any changes to the customer’s existing ICS network configuration, and second, the fix must be tested in an environment that mirrors exactly what the customer has deployed. For example, if a customer’s IBC is running on a 2018-era Siemens PLC with Modbus RTU, our engineering team doesn’t just test the fix in a generic lab—they set up a replica of that PLC, the exact Modbus device, and even simulate the power cycles and network latency that customer experiences in their facility. Why? Because we’ve seen too many cases where a “simple patch” from an IT vendor caused an ICS to stop working entirely, costing a manufacturer $2 million in a single day of downtime.
Next comes validation, and this is where our process differs most from competitors. We don’t just run the patch through our own tests—we share a pre-release version of the update with the customer’s dedicated OT engineer for a 2-week beta trial in a non-critical part of their system, or during a scheduled maintenance window. For example, a power plant customer last year had a bug where their IBC failed to sync with the primary controller during a grid outage. We released a patch, they tested it on a secondary IBC unit for two weeks, ran 10 simulated grid outages, and didn’t have a single issue. Then we rolled it out to all their units. This step adds time to the process—usually 30 days from bug discovery to full patch deployment—but it eliminates 99% of post-fix issues. We’ve had customers tell us this validation process is why they trust us more than other IBC providers, because we’re not forcing changes on their systems; we’re working with their teams to make sure every update is safe.
Once the patch is approved, we have a secure delivery process that’s built for OT networks. We don’t just send a link to a download—because many OT networks are air-gapped (not connected to the internet), so downloading an update directly is impossible. Instead, we offer two delivery methods: a physical USB drive that’s preloaded with the patch, encrypted and verified with a unique digital signature, or a one-time, VPN-only connection (requested by the customer) to transfer the patch via a dedicated, secure tunnel that’s disconnected immediately after the transfer. We also provide a step-by-step, visual installation guide that’s written specifically for OT technicians, not IT admins—no jargon, no required reboots of the entire network, and a 15-minute maximum installation time. Because again, OT teams don’t have time for hours of updates.
But our work doesn’t stop after the patch is deployed. We track every bug and every fix in our OT security database, and we use that data to improve future versions of IBC Guard. For example, after a bug was reported in 2022 where the IBC misinterpreted OPC UA’s timestamp format, we updated our code to support all 12 common timestamp formats used in OPC UA, and added an automated check that validates timestamp formatting during every connection setup. That change eliminated a whole category of similar bugs for all future customers. We also hold quarterly workshops with our customers’ OT security teams, where we walk through any new bugs we’ve discovered, explain what they mean, and show them how to check if their system is affected. Transparency isn’t just a buzzword for us—it’s how we build long-term trust in a space where vendors often keep security details quiet for fear of scaring customers.
I should also address a common misconception: some customers think that “no bugs” is the only goal. But in OT, the reality is that no software is ever 100% bug-free. The goal is to build a process that catches bugs before they cause harm, mitigates any risk if a bug is found, and updates systems in a way that never disrupts operations. Last year, we had a customer in the chemical industry who discovered a minor bug in their IBC Guard software during a routine audit—one that caused the IBC to generate a false positive alert about a pressure sensor. We responded within 2 hours, had a patch ready for their secondary system within 12 hours, and rolled it out during their scheduled 1-hour maintenance window that night. They didn’t lose any production time, and they told us our response was faster than their own internal security team’s process for patching their PLCs.
As a supplier, that’s the standard we hold ourselves to. I know that when a customer installs IBC Guard, they’re not buying a piece of software—they’re buying peace of mind that their critical systems are protected 24/7. That means when a bug comes up, whether it’s our fault or not, we’re there to handle it in a way that keeps their operations running, their team safe, and their business moving forward.
IBC Plastic Pallet If you’re a facility manager, OT security director, or system engineer responsible for keeping your industrial systems online, and you want to learn more about how our IBC Guard solutions handle software bugs (or any other cybersecurity concern), we’re here to talk. We work with facilities of all sizes, from small water treatment plants to large manufacturing complexes and power grids, and we tailor our support process to meet your exact needs. Reach out to our team to schedule a no-obligation consultation, where we can walk through your current system, discuss potential risks, and show you how our approach to bug management and OT security can benefit your operation.
References
- National Institute of Standards and Technology (NIST). (2020). Guide to Industrial Control Systems (ICS) Security. Special Publication 800-82 Revision 2.
- International Society of Automation (ISA). (2019). ISA-62443-4-2: Security for Industrial Automation and Control Systems – Part 4-2: Secure Product Development and Supply Chain Requirements.
- Industrial Control Systems Cyber Emergency Response Team (ICS-CERT). (2021). Common Vulnerabilities in ICS Components: Analysis and Mitigation Strategies.
- SANS Institute. (2022). OT Cybersecurity: Patching Strategies for Operational Technology Environments.
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