.htaccess is the typical way to ban blocks of IP addresses. Although vB has a ban IP feature, I think it only does singles, not blocks. If you were going to ban all the IP in Senegal, for example, you could add the following to your .htaccess file:
Code:
<Limit GET HEAD POST>
order allow,deny
deny from 41.208.128.0/18
deny from 196.1.92.0/24
deny from 196.1.93.0/24
deny from 196.1.94.0/24
deny from 196.1.95.0/24
deny from 196.1.96.0/24
deny from 196.1.97.0/24
deny from 196.1.98.0/24
deny from 196.1.99.0/24
deny from 196.1.100.0/24
deny from 196.207.192.0/18
deny from 213.154.64.0/19
allow from all
</LIMIT>
You can get the IP addresses for most of the Spammer Bad Boy Countries
HERE
HTH