Central Florida Businesses: Beware the Port Forwarding Trap
We see it constantly when onboarding new clients in Central Florida: a small business with port 3389 (Remote Desktop) forwarded straight through their router to a server or workstation. Sometimes it’s been that way for years, set up by a previous IT person who needed quick remote access and never closed it.
That open port is an invitation. Automated bots scan the entire internet continuously, looking for exactly these kinds of openings. When they find one, they launch brute-force attacks against it around the clock until they get in. And they will get in.
What Port Forwarding Actually Does
Port forwarding tells your router to send incoming traffic on a specific port directly to a device inside your network. It’s like putting a door on the outside of your building that opens straight into your server room. Legitimate uses exist, but in practice most port forwarding rules we find on small business routers are security liabilities.
The most dangerous ports to forward are 3389 (Remote Desktop Protocol), 22 (SSH), 445 (SMB file sharing), and 1433 (SQL Server). These are the first ports attackers check, and each one gives them a direct path into your systems if the credentials are weak.
Real Examples We’ve Seen in Central Florida
A medical practice in Kissimmee had RDP forwarded to their billing workstation for three years. When we ran a security scan during onboarding, we found over 40,000 failed login attempts in a single month. They were one weak password away from a full breach with patient data exposed.
A law firm in Davenport had port 445 open so an employee could access shared files from home. An attacker used it to deploy ransomware across their entire file server on a Friday night. By Monday morning, every client document was encrypted. The ransom demand was $85,000.
What to Do Instead of Port Forwarding
The answer is almost always a VPN. A business-grade VPN creates an encrypted tunnel into your network that requires proper authentication. Your team gets the same remote access they need, but without exposing any ports to the public internet.
For cloud-based access, solutions like Microsoft 365 and cloud-hosted applications eliminate the need for port forwarding entirely. If a specific application requires external access, put it behind a reverse proxy with proper authentication rather than forwarding the port directly.
How to Check Your Router Right Now
Log into your router’s admin panel and look for “Port Forwarding,” “Virtual Servers,” or “NAT Rules.” If you see any entries, especially for ports 3389, 22, 445, or 1433, disable them immediately and contact your IT provider to set up a proper VPN alternative.
If you’re not sure how to check or what you’re looking at, that’s exactly the kind of situation where a quick network assessment pays for itself. We regularly find open ports that business owners had no idea existed, left behind by previous IT support or installed by employees who needed a quick fix.
