IP Block List

deny ip list
In this page, you can find a list of IPs that will occasionally try to log into your Synology via SSH. This blacklist has been carefully prepared by Marius Bogdan Lixandru over several years of investigations. Below, you will find instructions to implement the list and add it into your Synology NAS DSM or Synology router SRM device. This block list is completely compatible with all Synology NAS models and Synology Routers like RT1900ac, RT2600ac, MR2200ac (follow the instructions below to add it on the router). The IP blacklist will be updated regularly. Remember, when you upload the file, upload it with the same name shown below: deny-ip-list this is the best and most effective Block IP List for your Synology NAS device. I will be reviewing the whole deny ip list every 1 month. The list below is fully compatible with DSM 7.


GMT+3 Update: October 18, 2021 Blocked 50183 malicious IP’s

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  • STEP 1

How to add IP Block List on your Synology NAS? Just go to Control Panel / Security / Protection tab/ Click Allow/Block List. Follow the instructions in the image below.

Synology DSM 7 ip block list 1

  • STEP 2

Once you have clicked Allow/Block List button, go to the Block List tab / Click the Down Arrow after Create / Click Import IP address list and insert the file you have downloaded from mariushosting (at the top of this page). Follow the instructions in the image below.

Synology DSM 7 ip block list 2

  • STEP 3

After the list is imported, you will be able to see the screen below. Select Expiration time “Forever” then check “Overwrite existing IP addresses on Block List and Allow List“, Browse the deny-ip-list.txt and upload the file from your computer then click OK. Follow the instructions in the image below.

Synology DSM 7 ip block list 3

  • STEP 4

Click Close. Everything should works like a charm. Your deny ip list is updated with the latest mariushosting definition.

Synology DSM 7 ip block list 4

You can also import the list to your Synology Router RT1900ac, RT2600ac, MR2200ac. The sequence is Network Center > Security > Auto Block > Allow/Block List (Follow the instructions in the image below).

router ip block list

Image Credit: Paul Barrett

Contact me to Contribute to the Malicious IP Block List.