Huge Bandwidth usage on an empty forum

[wcguy]

Does anyone have any suggestions on how to limit the huge bandwidth usage on a vbulletin forum, that has only three members and maybe 20 threads total? I'm talking 400 - 650 MB of monthly data outflow.

[wcguy]

Here is some more strangeness... The IPs won't resolve...

Listing domains, sorted by the amount of traffic.

#reqs %bytes domain
139223 100% [unresolved numerical addresses]

and

Figures in parentheses refer to the 7-day period ending Mar 31 2010 at 5:15 AM.

Successful requests: 139,223 (4,595)
Average successful requests per day: 374 (656)
Successful requests for pages: 3,243 (111)
Average successful requests for pages per day: 8 (15)
Failed requests: 3,808 (8)
Redirected requests: 933 (1)
Distinct files requested: 31,685 (244)
Distinct hosts served: 5,452 (58)
Data transferred: 1.60 gigabytes (69.92 megabytes)
Average data transferred per day: 4.40 megabytes (9.99 megabytes)

[mordor1]

Mayby some one hotlinks your images?

[TNCclubman]

Forums are massive bandwidth hogs. You may have 20 members, but when a search engine crawls your forum its like 100 people clicking every link on your forum for 15 minutes. And that happens every day from many different spiders.

[your24hourstore]

the only way to really help bandwidth is with special htaccess file that can govern it
google or yahoo bandwidth usage and htaccess ..something like that