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Strange behavior
This is a fantastic utility. Check this out: I have my Mac and a PC connected to a small hub on my desk. That's connected to a hub in the next office. When my PC has TCP traffic, TCPflow picks it up. Why is that? More interestingly, I can see the passwords (transmitted in clear text by Outlook) when the PC checks my email! What if I were connected to a larger hub at an office where it mattered? Could I see everyone's usernames and passwords when they check their email?
Sniffers
Jay: in a word, yes. You have discovered why "https" is a good thing. Network sniffing is Very Easy™.
Another cool sniffer util to check out is - Ettercap.
Etherpeek is a sweet network sniffer for OS9 and earlier. Etherpeek.
-Ben
Hub vs Switch
>When my PC has TCP traffic, TCPflow picks it up. Why is that?
re: replies
How interesting! Thanks very much. I new that a switch was more secure, but had never actually witnessed how public the information is!
Strange behavior
I think TCPflow picks up the data going to the PC because in the Ethernet specification(Carrier Sense Multiple Access/Collision Detect) frames go to every interface on the collision domain(any interface connected by a link-layer device like a hub). |
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