pppoe-sniff - phpMan

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 successfully 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,  con-
       nect  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 AT roaringpenguin.com along  with
       the name of your ISP and the manufacturer and model number of your DSL modem.  This
       information 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 AT roaringpenguin.com>.

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


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




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

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