When a Simple SQL Upgrade Turns Into a Security Adventure

In the world of small business technology, even the most routine vendor updates can create unexpected ripples. One client recently learned this firsthand when their software provider performed what seemed like an innocuous upgrade: moving their database engine to SQL Server 2022. On paper, it was a straightforward improvement. In practice, it created an immediate roadblock — their existing .bak files were no longer compatible with SQL Server Web Edition 2019, the version running on our cloud server at IONOS.

Suddenly, 3Deers couldn’t restore backups which is how we get data for the client’s reporting. The fix was clear: upgrade the cloud server to SQL Server Web Edition 2022 as quickly as possible. Fortunately, IONOS made this process smoother than expected. Their support team confirmed that an in‑place upgrade was possible, and their infrastructure allowed us to preserve the server’s hostname, IP identity, and firewall configuration. This meant no downstream changes to applications, connection strings, or client systems — a huge relief for everyone involved.

Once SQL Server Web Edition 2022 was installed and the database restored successfully, the client was back in business. But the story didn’t end there.

Shortly after the upgrade, 3Deers noticed something unsettling: repeated Remote Desktop lockouts and a flood of failed login attempts in the Windows Security log. At first glance, it looked like a side effect of the SQL upgrade. But a deeper look revealed something entirely different — and far more serious.

By filtering the Windows Security log for failed logon events (Event ID 4625), we discovered that the attempts weren’t coming from the client, their vendor, or IONOS. They were coming from random global IP addresses. These weren’t legitimate users; they were automated bots attempting to brute‑force the Administrator account over Remote Desktop.

Together, 3Deers and Co‑Pilot walked through the evidence step‑by‑step. We examined logon types, authentication packages, and failure codes. We confirmed that the attempts were network‑based, not interactive, and not tied to any internal process. In other words, this wasn’t a configuration issue — it was a hacker.

The fix turned out to be simple and elegant: restrict Remote Desktop access at the IONOS firewall so only 3Deers trusted IPs could connect. With one change, the server went silent. No more failed logons. No more lockouts. No more bots knocking on the door.

It was a perfect example of how modern cloud hosting, smart diagnostics, and AI‑assisted troubleshooting can work together. A routine SQL upgrade uncovered a hidden security threat, and with teamwork — human and AI — the problem was solved cleanly, confidently, and permanently.

If you’re interested in exploring secure cloud hosting options, IONOS remains a strong choice for small businesses. You can learn more through their affiliate link: IONOS Hosting.

If you’d like to dive deeper into topics like SQL upgrades, server hardening, or reading Windows Security logs, 3Deers and Co‑Pilot are always ready to help.  At 3Deers, we utilize Co-Pilot as a fast and reliable partner to help clients quickly and reliably.