Synology NAS beginners guide | Part 21 | Firewall

Note: As your NAS may not have been configured in the same way as the NAS seen in this video. Please note that if you enable the Firewall on your NAS. Access to your NAS might be effected until you have correctly configured your Firewall.  So if you accidentally lock yourself out of your NAS. You will need to perform a Mode one soft reset which will disable the firewall, but leave your applications and data intact.

• Log into Disk Station Manager (DSM) with administrators privileges.
• Select Control Panel – Connectivity – Security – Firewall.
• Within General, check the tick box next to Enable Firewall.
• Enable Firewall notifications.
• Create a Firewall Profile.
• Select Edit Rules.
• Create your Firewall rules.

Suggested Firewall rules to create:

Notes: Make sure that the Firewall rule, Management UI is always at the top of your list of rules. Management UI is the service that allows you to access the DSM from within a web browser. If Management UI is below your Deny All rule. You will not be able to access the settings on your NAS.

• After creating your rules select Apply.
• You now need to test that you are still able to access all of the application and services that you have installed on your NAS.

• Mydoodads article – Test a firewall port on your NAS using macOS.
• Mydoodads article – Test a firewall port on your NAS using Windows.
• Mydoodads article – How to soft reset (mode one) your Synology NAS.

• Wikipedia article – Firewall (Computing)
• Synology support article – Firewall.