Snoop vs. Tcpduimp

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Szerző: Jeffrey Pyne
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Tárgy: Snoop vs. Tcpduimp
Okay, this has been bugging me for a while now. I've R'ed the hell out of
TFMs, and I still can't figger this out. Using Solaris' snoop command, I
can do troubleshooting of layer 7 of the OSI model. I can view the data of
an SMTP dialog, a DNS query, an HTTP GET etc. Can I do this with tcpdump on
Linux? I suspect the answer is "Nope, you can only see the lower layers."
If it isn't possible, is there a common command line tool for Linux that
*will* let me do this?

~Jeff