IP Address blocked on Synology NAS due to forgotten Password

In this article, I will show you a simple trick to fix “IP Address blocked on Synology NAS due to forgotten Password” only if you can recall (remember) your password. To protect you against brute force attacks, Synology NAS has an “auto-block” feature that will add an IP address to the block list when the failed login attempts have reached the maximum number defined. The duration of the block and the number of failed login attempts is configured in DSM. Please see Step-by-step guide on how to set up the Synology DS923+ NAS, and how to reset your lost or forgotten Windows 10 Password.

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Why was this error prompted “IP Address has been blocked”?

This IP address has been blocked because it has reached the maximum number of failed login attempts allowed within a specific time period

This error was prompted because I entered the wrong username, and password numerous times. Several attempts led to my IP being blocked.

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The solution to IP Address blocked on Synology NAS

There are different ways to resolve this issue. The first is very simple if you remember your username or password. In my case, I was able to recall the username after hitting myself so hard.

Launch a VPN Client

I will be using Norton for this example. If you do not have a password, wait for the default time to elapse, except you have altered this which I will be showing you in the next guide on how to protect your Synology NAS.

Launch the Norton App and connect as shown below.

Regardless of the option you use. Launching the menu or searching from the App, the desired result will be achieved.

It is sufficient to select Turn on. But because I wish to select a different region. I will open the client.

As you can see we are connected.

Now, I am granted access to my Synology NAS because I am connecting from a different IP.

Like I mentioned, this solution will only work if you remember the username and password or wait for the duration configured to elapse.

Unblock IP Address on Synology

You can still sign in to your DSM account from another IP address. Follow these steps to remove the blocked IP address:

Now, Let’s launch the “Control panel” to see if we can unblock the previous IP blocked.

Click on Security

Navigate to the location below to remove your blocked IP address.

Account > Allow/Block List > Block List. 

Because, trusted clients are blocked after some minutes. I will not be able to show you these steps. Subsequently in the future, this scenario will be updated and the section will be updated.

Note: You can create and manage an allow list to exempt IP addresses that you trust from autoblock. You can also create and manage a block list to always prevent certain IP addresses from logging in to your Synology Router. Lists can be modified anytime by adding or removing IP addresses.

Reset Forgotten Synology Password for Administrator Account via Mode 1

The “Reset” and located next to the USB and Ethernet ports. Hold the reset button down for about five seconds. Locate the RESET button on your Synology NAS.

Use a paper clip or Pin to gently press and hold the RESET button until you hear a beep, and then release the button immediately.

If your Synology NAS does not beep when you press and hold the RESET button, this may be due to hardware failure. Please contact your local reseller for RMA service if your Synology NAS is still in warranty period.

When the RESET is performed, the device and password are reset. See the changes posed by Mode 1 reset.

Navigate to the URL find.synology.com in the address bar of your web browser and find your Synology NAS on the Web Assistant page or find your Synology NAS through the Synology Assistant desktop utility.

Double-click on your Synology NAS. Enter the system’s default username, admin, and leave the password field blank.

Click Sign In. Continue through the proceeding steps to finish resetting your password for your administrator account.

Follow the steps below for resetting DSM 6.2.4 and above. Reset the password for your account and click Submit.

If there is only one administrator account, the system will fill in the name admin in the username field automatically.

If there are multiple administrator accounts, select one from the drop-down menu to change its password. Click Sign In Now and sign in to DSM using the password you have created.

For DSM 6.2.3 and earlier, this process is significantly different. Please refer to the Synology documentation too.

What happens if the Mode 1 password does not work?

If the above method did not reset your administrator password, use a different browser. For DSM 6.2.4 and above, the “Keep admin password unchanged option is ticked at Control Panel > Update & Restore > System Reset” Please ensure this is disabled.

For DSM 6.2.3 and earlier: The Keep current admin password unchanged option is ticked at Control Panel > Update & Restore > Reset. If this is the case, you will need to follow the steps in “Mode 2: Reset Synology NAS and re-install DSM”.

Mode 2 reset will install a new DSM on your Synology NAS. All existing system configurations and package settings will be wiped out. However, the data in your shared folders will remain.

Mode 2: Reset Synology NAS and re-install DSM

As mentioned above, this mode will wipe out all system configurations and carry out all the reset functions included in Mode 1 above.

Locate the RESET button on your Synology NAS. Press and hold down the RESET button for about 4 seconds until you hear a beep. Release the button immediately.

Within 10 seconds, press and hold down the RESET button again for 4 seconds until you hear 3 more beeps.

Wait for about 2 minutes until the STATUS light on your Synology NAS blinks orange or green.4 You have successfully reset your Synology NAS and wiped the system configurations.

Enter find.synology.com in the search bar of your web browser and locate your Synology NAS. The status of your Synology NAS should be Configuration lost. Double-click on your Synology NAS.

Follow the wizard to complete the re-installation process.

What happens when you reset Synology NAS?

This section is informing your Synology NAS is reset via Mode 1, the following settings take place:

1: The admin account is restored to default and its 2-factor authentication setting is disabled.
2: The UI management port is reset to 5000/5001.

Note: For DSM 7.2 and above: IPv4 address, DNS, gateway, and other network interfaces are reset to DHCP. For DSM 6.2.4 to 7.1.x: IPv4 and IPv6 address, DNS, gateway, and other network interfaces are reset to DHCP.

3: PPoE is disabled.
4: Auto Block is disabled.
5: Firewall rules are disabled.
6: High-availability cluster is removed.
7: The Virtual Machine Manager cluster is removed. This can be recovered
8: Encrypted folders are unmounted and the feature Mount automatically on startup is disabled.

For security reasons, if the cypher is a machine key. It is deleted from Key Manager. It is also possible to retain the machine key for decrypting the shared folders after reset. I would advise to refer to the Synology website for more information.

Encrypted volumes are locked because the Encryption Key Vault has been erased and disabled. You must re-enable the vault and then use the respective recovery key to unlock each encrypted volume.

Note: The admin account is not shown in the drop-down menu when there are multiple administrator accounts. For security reasons, when you reset the password of another administrator account, the admin account is deactivated.

It is advisable to use a name other than “admin” to set up an administrator account.

I would like to refer you to the Synology documentation to learn about the apps and services that are affected by the admin account reset.

I hope you found this article useful on how to fix “IP Address blocked on Synology NAS due to forgotten Password”. Please feel free to leave a comment below.