Fix the Little Navmap access blocked error on Windows, web maps and tablets with checks for firewall rules, file permissions, proxies and paths.
Fix the Little Navmap access blocked error according to where it appears. For a tablet or browser, permit LAN access in the built-in web server and allow Little Navmap through the private-network firewall. For a Windows warning, unblock and re-extract the download. If only map tiles fail, change provider and check proxy filtering.
The same checks apply when Little Navmap is used with Microsoft Flight Simulator 2020 or 2024, FSX, Prepar3D and X-Plane. The location of the message matters more than its exact wording.
What does access blocked mean in Little Navmap?
The message describes a denied resource, not one specific Little Navmap fault. Identify what still works before changing settings.
| Where the error appears | Likely cause | First action |
|---|---|---|
| Browser, phone or tablet | Remote web access disabled, wrong address or firewall block | Enable LAN access and allow the app on private networks |
| When opening or updating Little Navmap | Windows file blocking, antivirus quarantine or protected folder | Unblock the archive and extract a clean copy |
| Online map background | Map provider refusal, rate limit, proxy or HTTPS filtering | Try another supported built-in map provider |
| Scenery database scan | Wrong simulator path or unreadable package folder | Correct the scenery path without taking ownership of protected Windows folders |
| Remote simulator connection | Firewall rule, network profile or Little Navconnect issue | Allow both programs on the trusted private network |
How do I unblock the Little Navmap web server?
If a browser or tablet displays the error while the desktop application works, the built-in web server is refusing or cannot receive the remote connection.
- Confirm that the web server is running. Start it inside Little Navmap and note the address and port reported by the application.
- Test it on the Little Navmap computer. Open the local address in a browser on that PC. If
localhostalso fails, the server is stopped, the selected port is already occupied or local security software is blocking it. - Permit local-network clients. In the web server options, enable access from the LAN rather than limiting it to the same computer. The setting label can differ between Little Navmap releases.
- Use the computer's LAN address. A phone or tablet cannot use
localhost, because that points back to the mobile device. Enter the computer address and port shown by Little Navmap. - Allow the present executable through the firewall. Permit inbound access on trusted private networks only. After moving or updating Little Navmap, remove stale firewall entries that refer to its old folder and approve the new location.
- Check the Wi-Fi network. Both devices must be on the same LAN. Guest Wi-Fi and wireless client isolation commonly prevent devices from reaching each other even though both have internet access.
Do not expose the Little Navmap web server by forwarding its port through the router. For the related server, simulator and network configuration, use our Little Navmap setup and connection walkthrough.
What if Windows blocks Little Navmap itself?
A Windows access warning is usually repaired by unblocking the downloaded archive and extracting it again to a folder your user account can write to.
- Close Little Navmap completely. An update cannot replace files that are still in use.
- Unblock the downloaded archive. Right-click the ZIP file, open its properties and select Unblock if Windows shows that option. Apply the change before extracting; if no option appears, continue to the next step.
- Extract a fresh copy. Use a new folder under your user profile. Do not run the program from inside the ZIP, merge an update into a damaged installation, or place it in
Program Files,WindowsAppsor a simulator's Community folder. Our Little Navmap download and installation notes are useful when checking an incomplete extraction. - Review security history. If antivirus or Windows Security quarantined a file, verify that the archive came from a source you trust before restoring or allowing it. Do not create a broad exclusion for the whole Downloads folder.
- Launch it as a normal user. Running as administrator is not a good permanent fix. If administrator mode removes the error, that confirms a folder-permission problem; move the installation or correct access to the specific folder instead.
User settings and flight plans should not be deleted as a first step. They are rarely responsible for Windows blocking the program executable.
Why are online maps or scenery folders still blocked?
A remote map-provider refusal and a local scenery-folder denial require different fixes, even when Little Navmap uses similar access wording for both.
Online map provider errors
If only one map theme fails, select another supported provider. An HTTP 403 response means the server rejected the request, while 429 normally means requests were rate-limited; neither is fixed by adding an inbound Windows firewall rule.
- If every online map fails, check that online access is enabled, the computer clock is correct and a proxy or security product is not filtering HTTPS traffic.
- If a corporate or school proxy is involved, a
407response indicates that proxy authentication is required. - Clear the map cache only if an old denial tile remains after changing provider. Do not delete the navigation database.
- Do not paste unofficial tile URLs into Little Navmap or repeatedly retry a blocked provider.
Google imagery has separate access and usage restrictions; our explanation of Google map availability and blank backgrounds in Little Navmap covers that specific case.
Scenery database access
If the error names a local folder during a database scan, point Little Navmap at the simulator's configured package or scenery location and confirm that your Windows account can read it.
- For Microsoft Flight Simulator, use the configured Packages location rather than the protected launcher installation directory.
- Do not take ownership of
WindowsApps; that can damage simulator updates and store permissions. - For scenery on an external drive, reconnect it under the expected drive letter and verify that the folder is readable.
- For Microsoft Flight Simulator 2024, follow the correct package-path and rescan procedure in our MSFS 2024 scenery database instructions.
Simulator connection blocks
If maps and scenery work but live aircraft data does not, treat it as a simulator connection problem. A local connection and a remote Little Navconnect connection use different paths; for a remote setup, allow the relevant programs on both computers, use a private network profile and confirm that the address has not changed.
The quickest diagnosis is the error detail: a named local path points to Windows permissions, a server status such as 403 points to the map provider, and a timeout on every service points to the firewall, proxy, DNS or network. Fix that layer rather than resetting all of Little Navmap.