OK, this is frustrating, my site got thousands of page views/connections in the last 3 days and finally we ran out of monthly bandwidth. We bought more bandwidth and closed the site for maintenance. We checked the logs and found a responsible IP and banned it, but when we opened the site the attack continued. This time it was from multiple IPs from different countries, they visited different pages of our website thousands of times.
What should we do?
EDIT This might be important: The robot or hacker or whatever seems to stick to one webpage and visit it over and over again (like our forum membership page) but when we restrict that page's permissions it just goes and finds other places. Weird.