I'm monitoring a friend's site which has seen a huge jump in bandwidth usage over the past couple of months. The site avg just under 500 MB/month but now has jumped up to 1.24 GB and 1.32 GB (then I let it get shutdown for the remainder of the month). It's already at 30 MB used just in the first day of the month.
I've created an .htaccess file stopping hotlinkers assuming this is where a lot of the bandwidth was going but it has not made a difference at all.
Looking at AWSTATS in the sites CPanel I see a lot of spam incoming links and I think this might be a potential problem.
I've installed and configured the following plugins Akismet, Bad Behaviour, Simple Trackback Validation and wp-cache. I assumed this would help with the load on the site but it continues to rise.
Does anyone have any experience with excessive bandwidth like this and have ways on how they stopped it or am I stuck with getting hammered on this site?