Myths About NAS Network Access, Debunked

A neighbor of mine bought a Synology DS224+ last spring, wanted to reach his photos from work, and did exactly what a random forum reply told him: he forwarded ports 5000 and 5001 straight to the box and called it done. Three weeks later his admin account was locked out by a brute-force flood in the logs, thousands of login attempts from IP ranges in a dozen countries.

He got lucky. His password was long and the account survived.

The problem was never the NAS. The problem was a pile of bad, confidently-stated advice that gets copied from thread to thread until it feels like common sense. So let me walk through the beliefs I see most often, and what is actually true.

Myth 1: You have to open ports to reach your NAS remotely

This is the big one, and it is wrong for almost every home user. Forwarding a port on your router means punching a permanent hole from the public internet straight to a service on your NAS. Every scanner on earth finds it within hours.

The fix that most people miss is that the major NAS vendors ship a relay service that needs zero open ports. Synology calls it QuickConnect, QNAP has myQNAPcloud Link. Both work by having your NAS make an outbound connection to the vendor's servers, so traffic reaches you without any inbound rule on your router.

If you want something vendor-neutral, a tool like Tailscale or WireGuard gives you a private encrypted tunnel. Your NAS becomes reachable as if it were on your home LAN, and nothing is exposed publicly.

Myth 2: Guest access is fine because it is read-only

I hear this constantly, usually phrased as "it is just guest, what is the worst that can happen." Plenty, as it turns out.

The guest account on most NAS systems is disabled by default for a reason. When you enable it, you are not just granting read access to one folder. You are creating an unauthenticated path into the SMB service itself, and old SMB guest sessions have been a favorite foothold for network worms.

Windows 10 and 11 actually block guest SMB connections by default now, which is why people enable guest on the NAS to "fix" a connection problem, then wonder why the fix is worse than the bug.

The right move is a real user account with a password, even for a shared media library. It takes ninety seconds to create and it means every connection is logged and revocable.

Myth 3: SMB is insecure by nature, so avoid it

This myth comes from a real event that people half-remember. The 2017 WannaCry outbreak spread through SMBv1, an ancient version of the protocol from the 1990s. The lesson people took away was "SMB bad." The correct lesson was "SMBv1 bad."

Modern SMB, meaning version 3 and up, supports strong encryption in transit and is perfectly safe on a home network. Your NAS almost certainly defaults to SMB3 already. The danger is only if SMBv1 is still switched on for some legacy device.

You can read Microsoft's own guidance on why SMBv1 should be removed at their SMB version documentation. It is a good reference to have open while you check your own settings.

How to check your SMB version

1. On Synology, open Control Panel, File Services, then the SMB tab and click Advanced Settings. Set the minimum protocol to SMB2 (or SMB3 if all your devices support it) and the maximum to SMB3.
2. On QNAP, go to Control Panel, Network and File Services, Win/Mac/NFS/WebDAV, and confirm the highest SMB version is selected.
3. On any Windows PC, run Get-SmbServerConfiguration in PowerShell and check that EnableSMB1Protocol reads False.

Myth 4: A strong password is enough on its own

A twenty-character password is great. It is also a single point of failure the moment it leaks in a breach somewhere else and you reused it.

Two-factor authentication changes the math completely. Even if an attacker has your exact password, they still cannot log in without the second code. Both Synology and QNAP support app-based 2FA, and turning it on for the admin account takes about two minutes.

The other half people forget is the default admin account itself. Rename it or disable it, and create a separate administrator with a different name. Bots overwhelmingly target the literal username "admin," so removing that target cuts the noise dramatically.

Myth 5: If it is behind my router, it is already safe

Your router's NAT gives you a real layer of protection, and that is genuinely worth something. The trouble is that people treat it as the only layer, then quietly undo it.

Enabling UPnP, forwarding a port for one game, or plugging in an IoT gadget with its own cloud tunnel can all poke holes you never see. And once an attacker is on your LAN, whether through a compromised laptop or a phishing link, the NAS behind the router is wide open if it has no internal defenses.

Myth 6: Automatic firmware updates will break things, so skip them

This one has a kernel of truth from a decade ago, when NAS updates occasionally shipped bugs. Today the far bigger risk is running old firmware with a known vulnerability that is already being exploited in the wild.

Both Synology and QNAP have pushed emergency patches for actively-exploited flaws in recent years. The users who got hit were, almost without exception, the ones months behind on updates.

Turn on automatic security updates, and schedule the reboot-required ones for a time you are not using the box.

What to actually do this weekend

Here is the short version I give people over coffee. Remove any port forwards to your NAS and switch to a relay service or a VPN like Tailscale.

Disable the guest account, create named user accounts, and turn on two-factor for anything with admin rights. Confirm SMBv1 is off and SMB3 is on, then let firmware updates install themselves.

Related reading: Cannot Access NAS on the Network: Fix It, NAS Not Resolving: Local DNS Problems Explained and Permission Denied on NAS Share: How to Fix.

None of it is hard, and none of it costs money. The whole list is maybe forty minutes of clicking, and it puts you ahead of the vast majority of home NAS setups that are quietly running on forum myths.