Ubuntu Server Firewall blocking

[Dr.CustUmz]

I've got my server all set up, and today I found the need to enable the firewall. I have spam-o-matic installed, i have configured my htaccess to

RewriteEngine on
RewriteCond %{HTTP_REFERER} ^http://*.vhoster\.org [NC,OR]
RewriteCond %{HTTP_REFERER} ^http://*vhoster\.org [NC,OR]
RewriteCond %{HTTP_REFERER} ^http://.*vhoster\.org [NC]
RewriteCond %{REMOTE_ADDR} ^91\.
RewriteRule .* - [F] 

order allow,deny
deny from 91.
deny from vhoster.org
deny from *vhoster.org
allow from all

something has to be wrong in that...

nothing is blocking this damn auto reg/post bot. well spam-o-matic's doing a good job keeping it from registering but, occasionally one slips through. its just annoying, and the problem is, the IP keeps changing.



so i enabled UFW and got that all set up but i cant figure out how to block "IPs begining with"

i have tried the following commands

ufw deny from 91*

ufw deny from 91/24

ufw deny from 91.*

ufw deny from 91

ufw deny from 91.

so how can i prevent this dang bot from accessing my site....?

--------------- Added [DATE]1461080252[/DATE] at [TIME]1461080252[/TIME] ---------------

I think this may have done it

ufw deny OUT from any to 91.200.12.64/32
ufw deny OUT from any to 91.200.12.0/22
ufw deny from 91.200.12.64/32
ufw deny from 91.200.12.0/22

htaccess:

RewriteEngine on
RewriteCond %{REMOTE_ADDR} ^91\.200\.12\.64$ [NC]
RewriteCond %{REMOTE_ADDR} ^91\.200\.(0*1+[2-5]+)\.([0-2]+[0-5]+[0-5]+)$
RewriteRule .* - [F,L]

order allow,deny
deny from 91.200.12.0/24
allow from all

and for a little more i threw this on the server
https://github.com/pushinginertia/ip...blacklist.conf

and added the ip ranges there too

anyone else got any more tips?