Can I check data being uploaded in a Firefox connection to a web site?

frank4360 · 07-24-2010, 03:12 AM

I use Firefox 3.5.9 and Ubuntu 9.10.

There is a suspicious amount of data (more than a megabyte) being uploaded from my computer whenever I log onto a commercial web site on which I advertise rental properties.

Is there any way I can see the data being uploaded - I am pretty familiar with the Unix/Linux system and commands.

TIA

unSpawn · 07-24-2010, 04:07 AM

If you want a quick look at requests and responses try Firebug or TamperData, elif you also need to log (and maybe modify?) them try Paros or Burp else tcpdump or wireshark?

GlennsPref · 07-24-2010, 04:21 AM

Hi, despite what unSpawn said,

you could keep track with Gkrellm, and it's plugins.

There is probably a more expedient method,

But Gkrellm tells me everything I need.

Date/Time Received and sent in Kilobytes.

Hope this helps. Glenn

frank4360 · 07-24-2010, 04:40 AM

Thanks both - I will look at tcpdump first.

frank4360 · 07-28-2010, 10:37 AM

Hello again

I tried tcpdump - but no good!

I didn't mention that I am on a dial-up modem connection, so there is no network interface for tcpdump to check!

Does anyone know a way to "snoop" on data sent from Firefox with such a connection. There is still a lot of data going out that I don't understand. If I was using Windows rather than Linux I would suspect a virus/worm/etc.

unixfool · 07-28-2010, 01:51 PM

Dial-up connections usually use ppp0, right? Please confirm what interface your dial-up connection is using (run 'ifconfig -a' and paste here if you don't know).

You can point tcpdump to ppp0 (same as if you had an ethernet connection...same method, different interface): tcpdump -i ppp0