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Before reaching your home NAS from outside, first reduce what can be reached from the internet, secure every account that can sign in, update the NAS and its apps, and arrange a recoverable backup. For most home setups, the preferred approach is to connect to a VPN server on the home router and then access the NAS over the home network. Avoid forwarding NAS services directly unless you need to, and never treat a custom port number as a security measure by itself.
Why remote access changes your NAS security
A NAS that is reachable from the public internet can receive connection attempts from outside your home. The important distinction is whether someone must first join your home network through a VPN, or whether the NAS itself accepts inbound connections. In its April 27, 2021 blog article, QNAP author Michael Wang wrote that a NAS connected directly to the internet is “reachable by anyone in the world.” That describes reachability, not a measured probability of attack. QNAP’s QTS 5.2.x guide likewise warns that networked devices face ongoing security threats.
Forwarding a port, enabling automatic port mapping through UPnP, putting the NAS in a router’s DMZ, or connecting it directly to a public IP can make NAS services reachable from outside. A consumer router does not automatically mean the NAS is protected: the actual router rules and NAS settings determine what is exposed. Before changing anything, identify the path you plan to use and confirm which services will be reachable afterward.
Choose how you will connect before changing router settings
There is no universal remote-access method that fits every NAS, router, and client device. Compare the options by how much they expose, how they are maintained, what authentication is available, and how they affect compatibility and performance.
#1 Best Overall
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| Route | NAS exposure | Setup and maintenance | Convenience and dependencies |
|---|---|---|---|
| VPN server on the home router | The NAS stays behind the router; connect to the home network through the VPN before accessing the NAS. | The router’s VPN endpoint needs secure configuration, updates, and strong authentication. | Requires router support and a compatible VPN client. Access depends on the home internet connection. |
| Directly published NAS service | The selected NAS service accepts inbound internet connections through a forwarding rule or equivalent configuration. | You must limit forwarded services, maintain the NAS and apps, and apply account, firewall, and login protections. | Can avoid first joining a VPN, but requires careful service and client compatibility. A changed external port does not replace other controls. |
| Vendor relay service | Traffic may be relayed rather than requiring the same direct inbound connection; check the vendor’s current implementation and terms. | Availability and configuration depend on the vendor’s service and account. | QNAP has described myQNAPcloud Link as an alternative and notes that relayed traffic can be slower. Verify current feature details before relying on it. |
QNAP recommends using a VPN server on the home router, then connecting to the NAS over the home network. This limits direct exposure of NAS services, but shifts the security responsibility to the VPN endpoint: keep the router supported and updated, configure the VPN securely, and protect access with strong authentication. A relay service may be useful where router VPN support or client compatibility is a constraint, but its current availability, terms, and behavior should be checked with its provider.
If you decide to publish a NAS service directly, treat that as a deliberate exception rather than the default. Expose only the service you need, use encrypted connections, and apply the account and firewall controls below. Do not forward SMB file sharing to the public internet.
Step 1: Inventory the NAS and its existing exposure
- Record the NAS identity. Note its make and model, operating-system name and version, installed applications, and which services you actively use. Menu labels and available protections vary across vendors and software versions.
- Inspect the router. Review port-forwarding rules, UPnP or other automatic port mapping, and DMZ configuration. Identify rules that point to the NAS and what service each one exposes. QNAP describes manual and automatic forwarding, as well as DMZ placement, as ways a NAS can be directly connected to the internet.
- Inspect the NAS. List enabled network services and remote-access settings. Compare these with the applications and devices that genuinely need them; do not assume a service is harmless just because it was enabled by default or is available only on the local network today.
- Remove exposure you do not need. QNAP recommends disabling forwarding, UPnP, and DMZ exposure for its NAS when possible. If a router rule has no known purpose, determine what depends on it before removing it; then verify that ordinary local NAS access still works.
This inventory is also your rollback reference. Keep a record of the original router rules and NAS settings so you can identify what changed if a needed service stops working. Avoid changing several unrelated settings at once: a deliberate change is easier to verify and reverse.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
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- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
Step 2: Update the NAS and applications
Install supported operating-system and application updates before enabling remote access. QNAP’s QTS 5.2.x guide recommends regular firmware and application updates and describes automatic update checks and installation. Use the update controls and release information for the exact model and software version; names and availability differ by vendor.
- Check whether the NAS model and its operating-system version remain supported by the vendor. Do not assume an update exists for an unspecified or end-of-support model.
- Review the available firmware or operating-system updates and installed-app updates. Apply supported updates, following the vendor’s instructions and any stated restart requirements.
- Confirm that the NAS restarts normally and that the applications you rely on still work locally.
- Set a recurring time to check for later security updates, or enable automatic update checks or installation if those options suit your device and maintenance needs.
Updating is an ongoing task, not a one-time preflight checkbox. If a device is no longer supported, the sources cited here do not establish a safe way to keep exposing it; consult the vendor’s current support information and avoid making unsupported equipment publicly reachable.
Step 3: Lock down accounts and permissions
Remote access makes account security especially important because a reachable login can be attempted from outside the home. Before enabling it, replace or disable default administrator access as the vendor permits, use unique strong passwords, turn on MFA or two-step verification where available, and remove accounts that no longer need access.
Rank #3
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- Establish a named administrator account. Follow the NAS vendor’s account guidance. QNAP’s QTS 5.2.x guide recommends creating another administrator account and disabling the default administrator account; Synology likewise recommends deactivating its default admin account. Do not disable a default account until you have confirmed that a separate administrator can sign in and manage the NAS.
- Use unique credentials. Set a strong password for each account and do not reuse a password from another service. Anyone with a valid account may have access according to that account’s permissions, so secure administrator and ordinary accounts alike.
- Enable available sign-in protections. Turn on the platform’s MFA or two-step verification where supported. Synology DSM 7.4 documents enforcement of two-factor authentication and adaptive MFA for specified users or groups, as well as protection rules for failed sign-ins. These are platform capabilities, not features present on every NAS.
- Review users and groups. Remove unknown, obsolete, or unnecessary accounts. Restrict each remaining user to the shares, applications, and services required for their role. Ordinary file access should not require administrator privileges.
- Test before relying on the new setup. Sign in with the intended administrator and a normal user, confirm their access is appropriate, and make sure recovery methods for MFA are available to the authorized owner.
Account controls are distinct from network controls: an exposed service still receives connection attempts even when its password is strong. Use both layers rather than expecting a password or MFA alone to make broad exposure harmless.
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Step 4: Disable services you do not use
Every enabled service creates another feature to maintain and potentially another way to reach the NAS. Turn off services that are not needed for your household’s current use, including remote shell, web, or database services when unused. Check the vendor’s descriptions before disabling a service that an installed app or another device depends on.
Pay particular attention to file-sharing protocols. Do not make SMB available through a public router port as a shortcut for remote file access; connect to the home network through a VPN instead. CISA’s StopRansomware guidance recommends disabling SMBv1 and moving to SMBv3 after checking dependencies. That guidance is broad, organization-level material, so adapt it to the NAS and client operating systems you actually use and verify that older devices or applications will still work before changing protocol settings.
Rank #4
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Step 5: Configure firewall and sign-in protections
Use the NAS firewall and router firewall to limit access to what your selected route requires. Synology’s hardening guidance recommends opening only the public router ports needed for services in use. For a VPN-first setup, do not leave unrelated NAS service ports forwarded just because the VPN is enabled.
- Enable available login-blocking or account-protection rules to reduce repeated failed sign-ins. Confirm how the vendor handles lockouts so legitimate users can recover access.
- Use IP access protection or firewall filtering if supported and appropriate for your connection. Do not rely on an allowlist that could lock you out when your own public IP changes unless you have a recovery route.
- If a service must be directly published, forward only the specific service port required, require an encrypted connection, and keep MFA, login protections, and updates enabled.
- Changing an external port number can reduce exposure to some routine scanning, as QNAP mentions in its advice, but it does not authenticate users or fix vulnerable software. Treat it only as an extra measure.
- Recheck the router after configuration to confirm that only intended ports are open and that no DMZ or automatic mapping has recreated broad access.
Do not invent port numbers based on a generic guide: required ports depend on the NAS service and configuration. Use the vendor’s current documentation for the exact model and application, and avoid forwarding a service if you cannot explain why it is needed.
Step 6: Enable the chosen remote route and test it
For a VPN-first setup
- Confirm that the home router supports a VPN server and that its firmware is supported and current.
- Configure the router VPN using its current vendor instructions. Use strong authentication and limit VPN accounts to people who need remote access.
- Connect a phone or computer from outside the home network using the appropriate VPN client. Test from a cellular connection or another external network rather than assuming a successful home Wi-Fi test proves remote reachability.
- Once the VPN is connected, access the NAS using its normal home-network address or name. Confirm that file access and any required apps work without publishing their NAS ports directly.
- Disconnect the VPN and test whether the NAS service is still reachable from outside. If it is, inspect router forwarding, UPnP, DMZ, and NAS remote-access settings to identify the remaining path.
For a directly published service
- Choose only the service that must be reachable and verify that it supports encrypted connections.
- Create a manual forwarding rule only for the required service, following the NAS and router vendor’s current instructions. Do not forward SMB or unrelated management services.
- Verify MFA or other available sign-in controls, account permissions, login protections, and updates before testing access externally.
- From a device outside the home network, test only the intended service. Confirm that other NAS services remain inaccessible from outside.
- Keep a record of the rule and owner. Remove it when the need ends, and review it after router or NAS changes.
NAS interfaces change across vendors and versions, so this cross-vendor guide does not prescribe a universal menu path. Use the exact model’s current documentation for the relevant account, firewall, update, and service controls instead of applying a menu path from another product line.
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Step 7: Run security checks and prepare recovery
Use the NAS vendor’s security utilities after hardening settings, then review and act on their findings. Synology documents Security Advisor as a built-in DSM utility that scans settings and recommends improvements. QNAP documents Security Counselor and Malware Remover. These tools are useful checks, not proof that a NAS is secure or a substitute for limiting exposure.
Set up a separate recovery destination before relying on the NAS remotely. QNAP’s QTS 5.2.x guide describes Hybrid Backup Sync to external devices, another NAS, or cloud storage. Snapshots and snapshot replication can add recovery options, but snapshots on the live NAS are not an independent backup: they remain associated with the same system. RAID can help maintain availability after some disk failures, but it is not a separate recovery copy either.
- Choose a destination that is separate from the live NAS, such as an external device, another NAS, or cloud storage.
- Configure a backup or replication job for the data that matters and check that it completes successfully.
- Test restoring a representative file so you know how to recover data rather than relying only on a job’s success message.
- If using an external USB drive, check its compatibility with the exact NAS model and interface before purchasing or relying on it.
Remote access increases convenience; it does not provide a second copy of the files. A usable backup plan needs a separate destination and a tested recovery path.
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Preflight checklist before you leave the network open
- You know the NAS model, operating-system version, installed apps, enabled services, and existing router rules.
- Unneeded forwarding, UPnP mappings, and DMZ exposure have been removed or disabled where appropriate.
- The NAS and apps are updated to supported releases, and you have a process for checking later updates.
- Default administrator access has been addressed, accounts are current, passwords are unique, MFA is enabled where available, and permissions are limited.
- Unused services are disabled, and no SMB file-sharing port is exposed directly to the public internet.
- You have selected a remote route, tested it from outside the home, and verified that only the intended services are reachable.
- Vendor security tools have been reviewed, and a separate backup has been configured with a tested restore.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
