>Say I have a range of IP addresses from 61.149.0.0 - 61.149.255.255 that I
>want to deny access.
>
>Is it okay to specify the subnet mask as 255.255.255.0 instead of just
>inputting the 61.149.255.255 so I'll get more range of addresses blocked?

No.

Entering 61.149.255.255 and a subnet mask of 255.255.255.0 will block 
61.149.255.0 through 61.149.255.255.

You want 61.149.0.0 with a netmask of 255.255.0.0 (same as 61.149.0.0/16).

                                                    -Scott
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