Linux ximian evolution.
I am on a AU$ 28.95 plan with a 200MB download limit which is far more than I need for the time. All of a sudden My ISP is charging AU$149 for the last month which is about AU$120.00 of excess download that I definitely did not have. With the plan I have this is about 9 days of non-stop download. I've reported the situation to the ISP and asked them to investigate but their answers are not promising. So I have a few questions.
1) I have tried to trace the source of the trouble on my machines but without success. Is there some tools I can use to help, preferably free. Perhaps I already have some with my distro (Fedora C2).
2) With the plan I have I get a "dynamic" ISP address and since all my internet connections are through this ISP, I thought that should
automatically offer some protection and that such exploit should mostly be detected by the ISP, so I blame the ISP for the problem. Is my view unfair?
3) I cannot afford this sort of monthly expense and I've told the ISP if there is no clear result of their investigation I will have to terminate the service just to prevent a repeat. Will it help if I change to another ISP? (I'm beginning to wonder about the one I have because they send me an email asking me to provide them with my password so that they could carry on with their investigation)
4) The "inbox" shows all the emails I've received and all the ones that are junk mail carry the mention "invoked by network" which I assumed means that one machine on the LAN (there is 3) is asking for it. Is that assumption correct?
It is worth noting that I have been working some 12 hours a day at this LAN (the 3 machines are next to one another) for the period involved, mainly testing network scripts, this involved regularly checking the modem's leds are blinking, showing the scripts did something and this modem was looking idle all the time except when a script was running successfully. On top of that, when I got up in the morning, it often happened that the internet connection was lost (another post) and as a result, I'm amazed that, if there was illicit traffic going on, I didn't notice it.
Thank you for your help.