Working from anywhere means something at the office is reachable from outside it. Done carefully, that is routine plumbing. Done casually, it is one of the most common ways attackers get into a small business — and the way in is rarely clever.
The good news: the difference between the safe version and the dangerous one is rarely money — it is a handful of decisions, made once.
How it goes wrong, almost every time
The pattern is consistent enough that incident responders can recite it from memory. Someone needed to reach the office computer from home, so port 3389 — Remote Desktop — was forwarded on the router. It worked, everyone moved on, and the port stayed open. Automated scanners sweep the entire internet for exposed Remote Desktop around the clock, so being found is not a risk, it is a schedule. Then a password is guessed by a patient bot, or bought from an old breach where an employee reused it. The attacker signs in as a legitimate user, looks around for a few days, quietly breaks the backups, and then encrypts everything.
Notice what is missing from that story: skill. No hacking in the movie sense — a door left open, and a key already floating around. If your setup forwards port 3389, or you are not sure, that is the thing to fix first, today. And if the worst has already happened, the first 24 hours of a ransomware incident have their own guide.
The right options, by size
Start with the question that gets skipped: what actually needs to be reached? If the answer is "the files", a proper cloud file service removes the need for remote access entirely, and its security becomes someone else's full-time job rather than your occasional one. Moving the thing beats tunnelling to it. If people genuinely need to reach machines or systems inside the office, pick by size:
- A handful of people: the VPN in your router or firewall. Most business-grade routers and firewalls include one. It creates an encrypted tunnel into the office network and costs nothing you have not already bought. The VPN is only as trustworthy as the box it runs on, though — if yours is a decade old or the ISP's default unit, read whether a small business needs a firewall first.
- A growing team in mixed locations: a WireGuard-based overlay. Tools in the Tailscale class build a private network between the devices themselves, wherever they are — office desktop, home machine, laptop on hotel Wi-Fi. There is no port to forward at all, each device is enrolled individually and removed individually, and setup is closer to installing an app than configuring a firewall. For most small businesses in 2026 this is the option to try first.
- A larger office with a user directory: an SSL VPN on the firewall. The traditional appliance approach. It ties into your Microsoft 365 or directory accounts, so joiners and leavers are handled in one place. There is more to configure, and the appliances themselves have had a rough few years of publicly reported security holes — an SSL VPN nobody patches promptly becomes its own exposed-RDP story.
- Remote Desktop behind any of the above. Fine. Behind, not instead of.
Vendor tools, and the scam that uses the same ones
Managed remote-control tools — TeamViewer, Splashtop, AnyDesk and similar — are the easiest route when someone must drive one specific machine, say the PC that runs a program nothing else runs. Pay for the business tier, turn on every access control it offers, and restrict which accounts may connect to which machines.
One caution that surprises people: these are precisely the tools phone scammers ask their victims to install. The software is honest; the person on the phone is not. If anyone claiming to be Microsoft, your bank or "support" asks you to install one, you are looking at the pop-up scam in its telephone form. Inside your business the rule is simple — remote-control software is installed by whoever manages your IT, on a known list of machines, and finding it anywhere else gets treated as an incident, not a quirk.
MFA on everything that faces outward
A password alone is not enough for a door into your business. Passwords leak, get reused and get phished, and remote access is exactly where a stolen one does the most damage. So every VPN, remote-desktop gateway and remote-control account gets a second factor — no exceptions, and no "just for now" exemption for the owner, whose account is the one attackers want most. Turning on two-factor authentication is roughly a 20-minute job per service, and it is the highest-value time in this entire guide.
Zero trust, in one honest paragraph
You will meet the phrase "zero trust" the moment you research any of this. The idea underneath the marketing is genuinely good: instead of one perimeter that trusts everything inside it, every connection is checked — which user, on which device, whether the device is healthy, and whether they are allowed to reach this one system rather than the whole network. The overlay tools above give a small business most of that without a project. What zero trust is not: a product you buy once, or a project that needs a consultant and an eighteen-month plan. Treat it as a direction to lean, not a purchase to make.
Know who connected
Whatever you choose will keep a log of who connected, when, and from where. Turn the logging on and actually read it — monthly is fine, and immediately after any departure is mandatory. You are looking for two things: accounts connecting at hours that make no sense for that person, and accounts that should no longer exist. Which leads to the housekeeping that fails most often:
- Individual accounts, never shared. A shared login means no idea who did what, and no way to remove one person without locking out everyone.
- Remove access the day someone leaves. Not at the end of the month. An ex-employee with working VPN credentials is a classic source of grief.
- Lock out repeated failed sign-ins, so an automated guessing attack gets nowhere slowly instead of somewhere eventually.
- Patch whatever faces the internet first. The VPN appliance, the remote gateway, the router firmware — first in line for updates, not last.
If this reads like the opening of a longer list, it is — the rest lives in the small business cybersecurity checklist.
On personal computers
Someone connecting from a home machine brings that machine's problems with them — the Windows that has not updated since 2023, the browser toolbar a grandchild installed, whatever else is quietly living on it. If home machines must connect, require an up-to-date system and turn on every device check your tool offers. Where the data is sensitive, a company laptop is cheaper than the alternative, and the overlay tools make one no harder to manage at a kitchen table than at a desk.
Having it configured, not just recommended
Everything above is a configuration job, not a shopping trip, and it is the kind of work a good technician finishes in an afternoon and gets right the first time. Koadi designs and sets up secure remote access end to end — the VPN or overlay, the firewall behind it, MFA on all of it, and the logging that tells you who connected. Post what you need free, in plain words; vetted, identity-verified technicians pick it up, you set a fixed price or take bids, and payment sits in escrow until you approve the work. Remote help covers every US state, with on-site visits through local technicians when hands are needed.