Is there a way to ban a Range of IPs?

[kenji4861]

I have a user that keeps changing the last digit of his IP to come to my site.

100.100.100.*

I tried banning that way, but it doesn't work. Is there a way to do this rather than writing all 1-255 possibilities?

[Zachery]

I have a user that keeps changing the last digit of his IP to come to my site.

100.100.100.*

I tried banning that way, but it doesn't work. Is there a way to do this rather than writing all 1-255 possibilities?
just add

100.100.100

[Tony G]

Using the first 3 IP intervals is the best way to keep out changing-IPs-when-reconnecting. (They usually just change the last interval)

[kenji4861]

Thanks guys.