A few months into running my smart home solution, I caught myself doing something a little embarrassing — I was so focused on adding new integrations and automations that I hadn’t actually stopped to check how exposed my setup was. Lights, locks, cameras, garage door sensors, all tied into one dashboard, and I genuinely couldn’t have told you off the top of my head whether it was locked down properly. If you’ve been building your own setup for a while, there’s a decent chance you’re in the same boat.
Security tends to be the part everyone plans to “get to later.” The problem is that Home Assistant isn’t just controlling a smart bulb — for a lot of us, it’s connected to door locks, garage openers, and cameras that show the inside of our homes. That’s a very different risk profile than a simple hobby project, and it deserves to be treated that way.
So here’s a practical, no-nonsense rundown of what actually matters when it comes to locking down your smart home solution — not a giant wall of theory, just the stuff worth doing.
Start With the Account Itself
This sounds almost too obvious to mention, but it’s still the single most common weak point. A shocking number of Home Assistant users are running default or reused passwords, sometimes the exact same one they use for their email or streaming accounts.
Your Home Assistant login is the front door to your entire home network in a very literal sense. Treat it that way:
- Use a long, unique password you don’t use anywhere else
- Turn on two-factor authentication inside Home Assistant’s user settings
- Create separate accounts for family members instead of sharing one login
- Avoid using “admin” or your name as the username where possible
None of this takes more than ten minutes, and it closes off the most common way people actually get compromised — not clever hacking, just guessed or reused passwords.
Be Careful How You Expose Yourself to the Internet
This is where a lot of well-meaning setups go wrong. If you want remote access to your smart home solution — and most people eventually do — how you expose your server to the outside world matters enormously.
Plain port forwarding without any protection layered on top is the riskiest approach, and it’s unfortunately still one of the most commonly recommended “quick fixes” in older tutorials. If you’re doing this, your login page is sitting directly on the open internet, and automated bots scan for exactly this kind of setup around the clock.
A few safer alternatives:
- Home Assistant Cloud (Nabu Casa) handles encryption and remote access for you, with no open ports at all.
- A personal VPN, like Tailscale or WireGuard, keeps your server invisible to the public internet entirely — you only connect to it as if you were on your home Wi-Fi.
- A reverse proxy with SSL, paired with something like DuckDNS, works well too, but only if you actually maintain it — renewing certificates and keeping the proxy updated.
If you’re currently using raw port forwarding with nothing else layered on top, that’s genuinely the first thing worth fixing, even before anything else on this list.
Keep Everything Updated — Actually Updated
I know, “keep your software updated” is the security advice equivalent of “eat your vegetables.” Nobody wants to hear it again. But Home Assistant releases updates frequently, and a meaningful chunk of them patch real vulnerabilities that have been actively discovered and disclosed.
The same goes for any add-ons, integrations, and the underlying operating system your smart home solution runs on. An outdated Home Assistant instance connected to the internet is a much softer target than one that’s current, simply because known vulnerabilities in old versions are public information.
Set a reminder if you have to. Check for updates monthly at minimum, and don’t ignore update notifications for months at a time just because “everything’s working fine.”
Lock Down Your Local Network Too
It’s easy to focus entirely on remote access and forget that your local network is part of the security picture as well. If someone gains access to your home Wi-Fi — a guest, a compromised device, or a poorly secured smart plug from an unknown brand — they could potentially reach your Home Assistant server directly, bypassing all your remote access protections entirely.
A few things worth doing here:
- Put IoT devices (smart plugs, bulbs, cheap sensors) on a separate guest or IoT-specific network segment if your router supports it
- Change your router’s default admin password, not just your Home Assistant password
- Disable remote management on your router unless you specifically need it
- Regularly review which devices are actually connected to your network
This step gets skipped constantly because it feels unrelated to Home Assistant itself, but a smart home solution is only as secure as the network it lives on.
Watch What You’re Actually Exposing
Not every integration needs to be reachable from outside your home. Take a minute to think through what actually requires remote access versus what you’re exposing out of habit or convenience.
Camera feeds, for example, are sensitive by nature — if you’re streaming them externally, make sure that connection is encrypted and authenticated properly, not just accessible because it happened to work. Similarly, review your automations for anything that could be triggered remotely in a way you wouldn’t want — unlocking doors automatically under certain conditions is convenient until it isn’t.
Home Assistant also has a built-in logging and notification system. Turning on login attempt notifications means you’ll actually know if someone’s trying to guess their way into your account, rather than finding out after the fact.
A Quick Gut-Check Table
| Security Step | Time It Takes | Impact |
|---|---|---|
| Unique password + 2FA | 10 minutes | Very high |
| Replace raw port forwarding | 30–60 minutes | Very high |
| Update Home Assistant regularly | Ongoing, minutes each time | High |
| Segment IoT devices on network | 30 minutes (router-dependent) | Medium-high |
| Review exposed integrations | 20 minutes | Medium |
Where I’d Personally Start
If you only have an hour this weekend to actually work on this instead of just reading about it, spend it on two things: fixing your password and 2FA setup, and reconsidering how you’re exposing your server remotely if you’re still using plain port forwarding. Those two changes alone close off the majority of realistic risk for a typical household running a smart home solution.
Everything else on this list matters, but it’s the difference between “very secure” and “extremely secure.” The password and remote access piece is the difference between “reasonably safe” and “sitting there waiting to be found.”
Frequently Asked Questions
Is Home Assistant safe to use if it’s connected to door locks? Yes, as long as remote access is properly secured through encryption, strong authentication, and regular updates. The risk comes from how it’s exposed, not from the software itself.
Do I really need a VPN if I already have a password on my account? A strong password helps, but a VPN or similar encrypted method prevents your login page from being publicly reachable at all, which removes an entire category of risk.
How often should I update Home Assistant? Checking monthly is a reasonable minimum, though updating as soon as security-related releases come out is better if you have door locks or cameras connected.
Should I keep smart home devices on the same Wi-Fi as my laptop and phone? Ideally not. Separating IoT devices onto their own network segment limits what a compromised device could reach if something ever goes wrong.