[Guy Harris <guy@xxxxxxxxxxxx>]

On Nov 16, 2003, at 5:22 PM, E.REYES wrote:

> Is there any way to capture packets over a logical or a PPP 
> interfaces with ethereal?

PPP interfaces?  Yes, if you're running on the right operating system:

	http://www.ethereal.com/media.html

"Serial" refers to PPP over various forms of serial lines in that list. 
 Note that the list isn't large, and note the caveats in the footnotes. 
 "Unknown" means "nobody's said they've done it", not "it won't work" - 
it will probably work on FreeBSD, NetBSD, and OpenBSD (and probably 
better than on any of the other OSes, although I'm surprised that you 
only get the non-control frames in Mac OS X; I'll have to look into 
that).  Note also that "Windows OT" refers to Windows 95/98/Me; note 
also that WinPcap 3.x does not support capturing on PPP interfaces.

As for "logical interfaces", I'd need to know what you mean by "logical 
interfaces" in order to answer your question.