Firewall: block of several numbers

[Robbit]

Hello and a happy New Year

I'd like to know how to let through or block several numbers for one firewall item. I tried to list a couple of numbers seperated by comma, semicolon and space. What's the proper way?

Thanks a lot
-Robbit.

[dwp]

Hello Robbit
Happy New Year.
Recommended to save all the numbers to a contact.
And then to establish a contact group "blacklist"
Add contacts to this group
Then in the call filter to intercept the group.