Draytek Vigor2620 LTE Series User Manual page 400

However, if an IP address is comfirmed to be blocked due to its abnormal behavior, click the
Blocking IP List tab to block it forever. For example, IP address "192.168.1.123" (displayed
on the following web page) will be blocked forever.
Available settings are explained as follows:
Item
White Passing IP List /
Black Blocking IP List
Refresh
388
Description
Enter the IP address in this field and click Add. It will be added
to the IP List and appear in the right frame.
IP list in the right frame will be blocked by Vigor system
permanatly.
Remove – It is used to remove selected IP address from the
Blocking IP List.
Click this link to refresh current page.
Vigor2620 Series User's Guide