How to block IP range

[Spenst, Aleksej]

Hi All,

Is there any syntax to block a certain IP range?
For example, I need to block only 100 IPs in the range: 10.0.0.1-10.0.0.100
I can't use the netmask like "block on eth0 from 10.0.0/24" since this will block 256 addresses.
I don't want also to write all IPs separated by comma like "block on eth0 from {10.0.0.1,10.0.0.2,.....}" since this will generate 100 separate rules (and this is also a very long rule).
Are there any other ways?

Thank you!
Aleksej.