PPPOED(8) BSD System Manager's Manual PPPOED(8)NAMEpppoed — handle incoming PPP over Ethernet connections
SYNOPSISpppoed [-Fd] [-P pidfile] [-a name] [-e exec | -l label] [-n ngdebug]
[-p provider] interface
The pppoed utility listens to the given interface for PPP over Ethernet
(PPPoE) service request packets, and actions them by negotiating a ses‐
sion then invoking a ppp(8) program. The negotiation is implemented by
the “pppoe” netgraph node. See ng_pppoe(4) for details.
The pppoed utility will only offer services to clients requesting ser‐
vices from the given provider, which is taken as an empty name if not
provided. If a provider name of “*” is given, any PPPoE requests will be
The supplied name will be given as the access concentrator name when
establishing the connection. If no name is given, the current base host‐
name is used.
After receiving a request (PADI) from the PPPoE netgraph node, pppoedfork(2)s a child process and returns to service further requests. The
child process offers service (using name) and waits for a SUCCESS indica‐
tion from the PPPoE node. On receipt of the SUCCESS indication, pppoed
exec /usr/sbin/ppp -direct label
as a shell sub-process. If label has not been specified, it defaults to
provider. It is possible to specify another command using the exec argu‐
ment. This is mandatory if provider and label are not given. The child
process will have standard input and standard output attached to the same
netgraph(4) data socket (see ng_socket(4)) when started.
The environment variables HISMACADDR and ACNAME are made available to the
child process and are set to the MAC address of the peer and the name of
the AC respectively.
Upon invocation, pppoed will attach a “pppoe” netgraph node to the rele‐
vant “ether” node using “interface:” as the node name, and then connect
that “pppoe” node to a local “socket” node. If the -F option has not
been given, pppoed will then go into the background and disassociate
itself from the controlling terminal. When the -F option is given,
pppoed stays in the foreground.
If the -d option is given, additional diagnostics are provided (see the
DIAGNOSTICS section below). If the -n option is given, NgSetDebug() is
called with an argument of ngdebug.
If pidfile is given, pppoed will write its process ID to this file on
After creating the necessary netgraph(4) nodes as described above, pppoed
uses syslogd(8) to report all incoming connections. If the -d option is
given, pppoed will report on the child processes creation of a new net‐
graph socket, its service offer and the invocation of the ppp(8) program.
If the -n option is given, netgraph diagnostic messages are also redi‐
rected to syslogd(8).
It is sometimes useful to add the following to /etc/syslog.conf:
and the following to /etc/newsyslog.conf:
/var/log/pppoed.log 640 3 100 * Z
SEE ALSONgSetDebug(3), netgraph(4), ng_ether(4), ng_pppoe(4), ng_socket(4),
syslog.conf(5), ppp(8), syslogd(8)HISTORY
The pppoed utility was written by Brian Somers ⟨brian@Awfulhak.org⟩ and
first appeared in FreeBSD 3.4.
If another netgraph node is using the given interface, pppoed will fail
to start. This is because netgraph(4) does not currently allow node
chaining. This may change in the future.
BSD November 8, 1999 BSD