PPPOE password sniffing

From: Nikolaj (lorddoskias@gmail.com)
Date: Tue Jan 23 2007 - 08:24:38 EST


I'm playing with pppoe for the time being and I noticed something rather
peculiar. I'm authenticating against radius server, and the
Authentication says it is PAP - eg. clear text passwords. I've read
through rfc 2516 and there is nothing said about the authentication with
  password. I'm wondering whether there is a way to sniff such
passwords? I tried sniffing my own connection when I was connecting to
the pppoe NAS but no luck. Where are the password and username contained
- in the payload of some of the PAD* packets?

Regards.

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