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jld · Mar 11, 2004, 06:51 PM

So I was surfing through the shared music folders on my network via Itunes. I happened upon a rare out of print album of a really great band. I've wanted this CD for months, but it was limited edition, before the band got signed to a real label, and I I can't find it anywhere.

I want to download the album from this guy, but of course the new iTunes prohibits this. I'd be more than happy to try to contact him to get a physical copy, but I don't know who he is. I live on a college campus. It could literally be thousands of people. Anyway to trace the IP when streaming etc??? I searched the network for the files, but I didn't find anything.

Any advice?

mitchell_pgh · Mar 11, 2004, 09:21 PM

It can't be 1000's of people as it only works with your subnet. most likely (for a university), it's 254 people ...

Anyway, download PortSniffer and enter a range of IP addresses near your computer and scan for port 3689. Say your ip address is 66.195.63.25, scan from 66.195.63.1 - 66.195.63.254... it should be in that range.

Also check in your Network setup for your subnet mask... if the last number is a zero, there are 254 people that it could be. if the number is larger, the number of people is lower.

FYI your whole university owns 66.192.0.0 - 66.195.63.255, so technically you could scan the whole thing, but that would be dumb.

PS. many universities ban this sort of scanning so double check your agreement.

You could also scan for other Mac like ports being open...

Did you turn on Rendezvous chat? That may be even faster...

mitchell_pgh · Mar 11, 2004, 10:06 PM

OK, here is a smarter way, and it ensures that you get the IP address FAST

open terminal and type in the following

Code:
lsof | grep iTunes | grep IPv4

(this is assuming that you are using IPv4, which you are I'm sure...)

Bo yaa!

mitchell_pgh · Mar 11, 2004, 10:09 PM

I get something like this

Code:
iTunes    1224 mitch   22u  IPv4 0x014d7214        0t0      TCP 192.168.1.100:daap->192.168.1.101:49157 (ESTABLISHED)
iTunes    1224 mitch   23u  IPv4 0x01a8e9f8        0t0      TCP 192.168.1.100:49356->192.168.1.101:daap (ESTABLISHED)
iTunes    1224 mitch   25u  IPv4 0x010a3824        0t0      TCP 192.168.1.100:49354->192.168.1.101:daap (ESTABLISHED)

192.168.1.100 is my IP
192.168.1.101 is his/her IP