Respect the old guard. Keep a copy of the installer on a flash drive. And maybe, just maybe, don’t expose your print server to your IoT VLAN. Would you like a shorter version for social media or a troubleshooting-focused follow-up?

When you enable the print server function on your router, any device on your network that knows the IP and port can send raw print jobs to your printer. No authentication. No encryption. That means a compromised smart bulb, a guest Wi-Fi user with a little command-line knowledge, or even a malicious mobile app could flood your printer with pages of garbage—or worse, exploit known printer vulnerabilities (think CVE-2017-0911 on some HP models).

So why do I still use it? Because some printers outlast routers. That old Brother HL-2170W from 2008? Its Wi-Fi died years ago, but its USB port is flawless. Plugged into a TP-Link Archer A7, with the USB Printer Controller running on an always-on home server, it prints 10,000 pages a year without complaint.

But here’s what most reviews won’t tell you: the TP-Link USB Printer Controller is a .

That’s genius, and frustrating at the same time.

At first glance, it’s just a utility that lets you share a USB printer plugged into a TP-Link router. But dig deeper, and you’ll find a surprisingly resilient piece of network plumbing. It uses (the HP Jetdirect standard) or LPR, depending on the printer and firmware version. The TP-Link controller doesn’t just “see” the printer—it creates a virtual USB port on your PC, tricking old applications into thinking the printer is still locally attached.