pppoe-sniff man page on Archlinux

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PPPOE-SNIFF(8)							PPPOE-SNIFF(8)

NAME
       pppoe-sniff - examine network for non-standard PPPoE frames

SYNOPSIS
       pppoe-sniff [options]

DESCRIPTION
       pppoe-sniff  listens  for  likely-looking PPPoE PADR and session frames
       and deduces extra options required for pppoe(8) to work.

       Some DSL providers seem to  use	non-standard  frame  types  for	 PPPoE
       frames,	and/or	require a certain value in the Service-Name field.  It
       is often easier to sniff those values from a machine which can success‐
       fully connect rather than try to pry them out of the DSL provider.

       To use pppoe-sniff, you need two computers, a DSL modem and an Ethernet
       hub (not an Ethernet switch.)

       If the DSL modem normally connects directly to your computer's Ethernet
       card,  connect  it  to the "uplink" port on the Ethernet hub.  Plug two
       computers into normal ports on the hub.	On one computer, run  whatever
       software the DSL provider gave you on whatever operating system the DSL
       provider supports.  On the other computer, run  Linux  and  log	in  as
       root.

       On  the Linux machine, put the Ethernet interface into promiscuous mode
       and start pppoe-sniff.  If the ethernet interface is eth0, for example,
       type these commands:

	    ifconfig eth0 promisc
	    pppoe-sniff -I eth0

       On  the	other  machine,	 start	your DSL connection as usual.  After a
       short time, pppoe-sniff should print recommendations for the  value  of
       PPPOE_EXTRA.   Set  this	 value in /etc/ppp/pppoe.conf.	If pppoe-sniff
       indicates that something special is required in PPPOE_EXTRA, please  e-
       mail  this  to pppoe@roaringpenguin.com along with the name of your ISP
       and the manufacturer and model number of your DSL modem.	 This informa‐
       tion  will be collated and provided on the PPPoE web page for users who
       do not have two computers.

       After pppoe-sniff finishes (or you stop it if it seems hung),  remember
       to turn off promiscuous mode:

	    ifconfig eth0 -promisc


OPTIONS
       -I interface
	      The  -I  option  specifies the Ethernet interface to use.	 Under
	      Linux, it is typically eth0 or eth1.  The	 interface  should  be
	      "up" and in promiscuous mode before you start pppoe-sniff.

       -V     The -V option causes pppoe-sniff to print its version number and
	      exit.

BUGS
       pppoe-sniff only works on Linux.

AUTHORS
       pppoe-sniff was written by David F. Skoll <dfs@roaringpenguin.com>.

       The pppoe home page is http://www.roaringpenguin.com/pppoe/.

SEE ALSO
       pppoe-start(8),	   pppoe-stop(8),      pppoe-connect(8),      pppd(8),
       pppoe.conf(5),	pppoe(8),   pppoe-setup(8),   pppoe-status(8),	pppoe-
       server(8), pppoe-relay(8)

4th Berkeley Distribution	  3 July 2000			PPPOE-SNIFF(8)
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