I am using Putty to SSH into my server. I installed iptraf to see my network usage. And (horrors) my IP address is sending in traffic at my server's SSH at 60kbps. Keeping Putty open for a few hours can generate GBs of traffic.
I know that WinSCP doesnt generate idle traffic. What seems to be the problem?
I ran wireshark along with Putty. Turns out that iptraf was the problem. An interactive app which constantly updates the display generates lots of traffic. An idle terminal generates no traffic.