Auto Block

Auto block allows you to prevent unauthorized login. After enabling the service, an IP address will be blocked if it has too many failed login attempts. Failed login attempts via SSH, Telnet, rsync, Network Backup, Shared Folder Sync, FTP, WebDAV, Synology mobile apps, File Station, or DSM will all add up. You can also have an Allow List which includes the IP addresses that will never be blocked.

To set up auto block:

  1. Go to the General tab and tick Enable auto block.
  2. Enter a number for Login attempts and Within (minutes) to block an IP address after a set number of failed login attempts within the specified number of minutes.
  3. Tick Enable block expiration and enter a number to remove a blocked IP address after the specified number of days. Blocked IP addresses will remain indefinitely on the block list unless manually removed from the list if this option is not selected or if Unblock after (days) is set to 0.
  4. Click Apply.

To add blocked IP addresses:

Click the Block List tab, and choose either of the following from the Create drop-down menu:

To remove blocked IP addresses:

  1. Click the Block List tab to see the list of blocked IP addresses.
  2. Select the IP addresses you want to remove from the list and click Remove.

To add allowed IP addresses:

Click the Allow List tab, and choose either of the following from the Create drop-down menu:

To remove allowed IP addresses:

  1. Click the Allow List tab to see the list of allowed IP addresses.
  2. Select the IP addresses you want to remove from the list and click Remove.