That would be a simple fix. But as far as IP's go it gets really tricky keeping an updated list and resolving proxies. Unfortunately we wouldn't know an exception occurred until it's too late. Hosting sensitive material on a VB system is probably not the smartest idea either.
However, if we keep the site from being discovered by google and restrict access as much as possible, we can get around most of these issues.
ok then simple way to protect your website from bots is
put id n pass in ur .htaccess file bots can't enter id n pass .. id n pass can b simple like id 123 pass 123
then u can lock down vb like register to view the site.. and you can disable the registration
and Manuel make the employee's ids then send them to thier email so only they can log in not the other ppl !!!