1PPPOE-SNIFF(8)              System Manager's Manual             PPPOE-SNIFF(8)
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NAME

6       pppoe-sniff - examine network for non-standard PPPoE frames
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SYNOPSIS

9       pppoe-sniff [options]
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DESCRIPTION

13       pppoe-sniff  listens  for  likely-looking PPPoE PADR and session frames
14       and deduces extra options required for pppoe(8) to work.
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16       Some DSL providers seem to  use  non-standard  frame  types  for  PPPoE
17       frames,  and/or  require a certain value in the Service-Name field.  It
18       is often easier to sniff those values from a machine which can success‐
19       fully connect rather than try to pry them out of the DSL provider.
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21       To use pppoe-sniff, you need two computers, a DSL modem and an Ethernet
22       hub (not an Ethernet switch.)
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24       If the DSL modem normally connects directly to your computer's Ethernet
25       card,  connect  it  to the "uplink" port on the Ethernet hub.  Plug two
26       computers into normal ports on the hub.  On one computer, run  whatever
27       software the DSL provider gave you on whatever operating system the DSL
28       provider supports.  On the other computer, run  Linux  and  log  in  as
29       root.
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31       On  the Linux machine, put the Ethernet interface into promiscuous mode
32       and start pppoe-sniff.  If the ethernet interface is eth0, for example,
33       type these commands:
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35            ifconfig eth0 promisc
36            pppoe-sniff -I eth0
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38       On  the  other  machine,  start  your DSL connection as usual.  After a
39       short time, pppoe-sniff should print recommendations for the  value  of
40       PPPOE_EXTRA.  Set this value in /etc/ppp/pppoe.conf.
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42       After  pppoe-sniff finishes (or you stop it if it seems hung), remember
43       to turn off promiscuous mode:
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45            ifconfig eth0 -promisc
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OPTIONS

49       -I interface
50              The -I option specifies the Ethernet interface  to  use.   Under
51              Linux,  it  is  typically eth0 or eth1.  The interface should be
52              "up" and in promiscuous mode before you start pppoe-sniff.
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55       -V     The -V option causes pppoe-sniff to print its version number and
56              exit.
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BUGS

60       pppoe-sniff only works on Linux.
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AUTHORS

64       pppoe-sniff was written by Dianne Skoll <dianne@skoll.ca>.
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66       The pppoe home page is https://dianne.skoll.ca/projects/rp-pppoe/.
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SEE ALSO

70       pppoe-start(8),      pppoe-stop(8),      pppoe-connect(8),     pppd(8),
71       pppoe.conf(5),  pppoe(8),   pppoe-setup(8),   pppoe-status(8),   pppoe-
72       server(8), pppoe-relay(8)
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774th Berkeley Distribution         3 July 2000                   PPPOE-SNIFF(8)
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