I have 30GB incoming BW and only 3GB outgoing BW for today. I run a webproxy script on my VPS. What would this mean, is my script being attacked or something?
Check your apache logs, it will tell you all the incoming connections and the IP's accessing your sites. If they are different it is probably a small DDoS or definitely someone trying to hog your bandwidth. /usr/local/apache/logs/access_log is where it is at. Or simply use something like AWStats to check the bandwidth usage per IP.