You can permanently block the offending IP numbers and even the class C that they are part of if you want to. Edit the file "pre-chain-split.sh" that's located in /etc/Bastille/firewall.d
Add lines like this to it...
iptables -A INPUT -s xx.xxx.xx.0/24 -j DROP
(blocks the class C)
iptables -A INPUT -s xx.xxx.xx.x -j DROP
(blocks the individual IP)
Then restart Bastille with /etc/init.d/bastille-firewall restart