What RDP actually does

Remote Desktop Protocol (RDP) is a tool that lets you see and control a computer from somewhere else. When you connect using RDP, you're looking at another computer's screen on your own device, and your keyboard and mouse control that distant machine as if you were sitting in front of it. Microsoft built RDP into Windows, so it's already on most Windows computers — you don't need to install anything extra to use it.

The most common reason people use RDP is to work from home while controlling their office computer, or to fix a family member's computer without being in the same room. IT departments use it constantly to troubleshoot problems on employee machines. You can also use RDP to access a server that runs a business process, or to manage a computer you own but keep in a different location.

RDP sends everything you see and do over an encrypted connection, which means the data traveling between your computer and the distant one is scrambled so others on the network can't read it. That encryption is built in — you don't have to set it up separately.

Key Takeaways

  • RDP lets you see and control another computer's screen from your own device, and it's built into Windows machines by default.
  • The connection is encrypted, so what you send and receive is scrambled and harder for others on the network to intercept.
  • You need the other computer's address (an IP address or hostname), a username, and a password to connect.
  • RDP works best on the same local network or through a VPN, because connecting directly over the open internet creates security risks if not set up carefully.
  • Alternatives like TeamViewer or Chrome Remote Desktop don't require you to open ports on your router, making them simpler for casual use.

How to set up RDP on a Windows computer

Before you can connect to a Windows computer using RDP, that computer has to allow incoming RDP connections. On the computer you want to control remotely, open Settings, go to System, then select Remote Desktop. Toggle the switch to "On." Windows will then tell you the computer's name — write this down, because you'll need it to connect.

Next, you need to know which user account you'll log in with. RDP uses your Windows username and password. If you're connecting to your own work computer from home, you'll use your work account credentials. If you're helping someone else, they need to give you their username and password, or create a separate account just for remote access.

The computer you're connecting from (the one you're sitting at) also needs RDP software. Windows machines have the Remote Desktop Connection app built in — search for "Remote Desktop Connection" in the Start menu. On Mac or Linux, you'll need to read a third-party RDP client like Microsoft Remote Desktop (available free from the App Store) or Remmina.

Connecting over your local network versus the internet

If both computers are on the same home or office network, connecting is straightforward. Open Remote Desktop Connection, type the other computer's name or local IP address, enter your username and password, and you're in. This is the safest way to use RDP because the connection never leaves your network.

Connecting over the internet is more complicated and riskier. To do it, you'd normally have to open a port on your router and forward it to the computer running RDP. This exposes that computer to the internet, and if your password is weak or you haven't installed security updates, someone could break in. Many security breaches happen this way — attackers scan the internet for open RDP ports and try common passwords until one works.

If you need to access a computer from outside your network, a VPN (virtual private network) is much safer than opening ports. A VPN creates an encrypted tunnel between your device and your home or office network, so you can connect to computers on that network as if you were sitting there, without exposing RDP to the internet directly.

When RDP is the right choice

RDP works best when you control both computers or have permission from the owner, and when you're comfortable with the security trade-offs. If you're an IT professional managing company computers, RDP is standard. If you work from home and need to access your office machine, RDP through a VPN is reliable and fast.

RDP is also good when you need to run software that only exists on one computer, or when you need to transfer files between machines — you can copy and paste files directly through an RDP session, or map a folder on your local computer so the remote machine can see it.

RDP is less ideal if you're trying to help someone who isn't tech-savvy, because they have to enable RDP, give you their password, and remember their computer's name or address. For casual tech support, tools like TeamViewer or Chrome Remote Desktop are simpler because the person you're helping just clicks a link or shares a code — no setup required.

Security things to know about RDP

RDP itself is find when used correctly, but the way people use it often isn't. The biggest risk is a weak password. If you're exposing RDP to the internet (which you shouldn't do, but people do), attackers will try thousands of passwords per second until one works. A strong password — at least 12 characters, mixing uppercase, lowercase, numbers, and symbols — makes this much harder.

The second risk is outdated software. Windows regularly patches security holes in RDP. If you haven't run Windows Update in months, you might be vulnerable to attacks that exploit known flaws. Check for updates in Settings and install them before you use RDP, especially if you're connecting over the internet.

The third risk is leaving RDP on when you don't need it. If you only use RDP occasionally, turn it off in Settings when you're done. This closes the door to anyone trying to break in. You can turn it back on whenever you need it.

If you're managing RDP for a business, consider using a VPN instead of exposing RDP directly, requiring multi-factor authentication (a second form of ID beyond just a password), and limiting which user accounts can connect remotely.

RDP alternatives that might be simpler

TeamViewer is a commercial tool that works on Windows, Mac, and Linux. You install it on both computers, and it handles all the networking complexity for you — no port forwarding, no VPN setup needed. The free version works for personal use; paid plans are available for business. The trade-off is that TeamViewer sees the connection (they have access to your data in transit), whereas RDP over a VPN is private between you and your network.

Chrome Remote Desktop is free and works if both people have a Google account and the Chrome browser. It's simpler than RDP for casual use — you just share a code with the person you want to help, and they can see your screen or you can see theirs. It's not as fast as RDP for regular work, but it's fine for occasional support.

Microsoft Remote Desktop (the app, not the protocol) is free and works on Windows, Mac, and iPad. It's just a nicer interface for connecting using RDP, so it has the same security considerations as RDP itself.

Frequently Asked Questions

Do I need to pay for RDP?

No. RDP is built into Windows and is free to use. You only pay if you use a third-party tool like TeamViewer or if you rent a server in the cloud that you connect to via RDP.

Can I use RDP on a Mac to control another Mac?

Not directly — RDP is a Windows protocol. You can use RDP on a Mac to control a Windows computer, but to control another Mac remotely, you'd use Apple's built-in Screen Sharing or a tool like TeamViewer or Chrome Remote Desktop.

What's the difference between RDP and VPN?

A VPN encrypts all your internet traffic and makes it look like you're on a different network. RDP is a tool for controlling one specific computer remotely. You can use RDP over a VPN connection for extra security, but they do different things.

Is RDP safe to use on public WiFi?

Not directly. On public WiFi, someone could intercept your RDP connection and steal your password. Always use a VPN on public WiFi before connecting via RDP, or wait until you're on a trusted network.

What do I do if I forget the password to the computer I'm trying to access?

You'll need to reset it on that computer itself — you can't do it remotely through RDP. If you own the computer, you can restart it and use Windows password recovery tools. If it's someone else's computer, they'll need to reset their own password.