Who's using my bandwidth?
This morning I noticed for the last 12 hours we've had a consistently large amount of outgoing traffic and I'd like some guidance as to how I can find out whats causing this.
I've got a Linux gateway with Slackware 12 installed. I'm using rrdtool to log and graph traffic volume. A weekly graph is below showing the sudden volume of traffic. After logging traffic for a year this has never been seen before. I also have a squid proxy with SARGE, but the reports show this isn't web traffic. This is on a network with about 30 systems.