Tribblix: manual page: pppoed.8

PPPOED(8) Maintenance Commands and Procedures PPPOED(8)

NAME

pppoed - PPPoE server daemon

SYNOPSIS

ppoed [options]

DESCRIPTION

The pppoed daemon implements the server-side negotiation of PPPoE.
When a client requests service from this daemon, a copy of pppd(8) is
invoked to handle the actual PPP communication.

At startup, options are read from the command line and the
/etc/ppp/pppoe file. After these options have been read, options in
the per-device /etc/ppp/pppoe.device files are read, using the device
names specified on the command line or in /etc/ppp/pppoe. Device
names are not permitted in the per-device files. It is not an error
if any of these files are absent; missing files are ignored.

Options are reread in the same order on SIGHUP. Except for the
possibility of short delays due to the processing time, SIGHUP does
not interfere with any client operations. Current status, including
options read, is dumped to /tmp/pppoed.pid on SIGINT.

The options are used to set up a list of services to be offered to
PPPoE clients on the broadcast domains (Ethernet subnets) specified
by the named devices. Option parsing is always in one of two modes,
either global mode or service mode. The initial mode at the beginning
of each file (and the command line) is global mode. Options specified
in global mode serve as default values for subsequently defined
services. Service mode is entered by the service name option. In this
mode, the named option is defined. Options that appear in this mode
override any global mode definitions for the current service.

The option parsing follows standard shell tokenizing rules, using
whitespace to delimit tokens, quotes to enclose strings that can
contain whitespace, and escape sequences for special characters.
Environment variables are substituted using familiar $VAR and ${VAR}
syntax and set using NEWVAR=string. Variables are both usable in
subsequent options and provided to the pppd(8) processes spawned for
each client, but they are interpreted as they are encountered during
option processing. Thus, all set variables are seen by all processes
spawned; position in the configuration files has no effect on this.

OPTIONS

The pppoed daemon supports the following options:

client [except] client-list

This option restricts the clients that may receive the service.
If the except keyword is given, then the clients on the list
cannot access the service, but others can. If this keyword is not
given, then only the listed clients can access the service.

This option can be specified more than once for a given service.
For a given client, first match among all listed options
encountered specifies the handling. If it matches an option with
except specified, then access is denied. Otherwise, it is
granted. The client list within a service is prepended to any
list specified in the global context.

If no client options are given or if all options are specified
with except, then all clients are permitted by default. If any
client options without except are specified, then no clients are
permitted by default.

The client-list is a comma-separated list of client identifiers.
The match is made if any client on the list matches; thus, these
are logically "ORed" together. Each client identifier can be
either a symbolic name (resolved through /etc/ethers or NIS, as
defined by /etc/nsswitch.conf) or a hexadecimal Ethernet address
in the format x:x:x:x:x:x. In the latter case, any byte of the
address can be "*", which matches any value in that position. For
example, 40:0:1a:*:*:* matches Ethernet adapters from the
manufacturer assigned block 40:0:1a.

debug

Increase debug logging detail level by one. The detail levels are
0 (no logging), 1 (errors only; the default), 2 (warnings), 3
(informational messages), and 4 (debug messages). Log messages
are written by default to syslog(3C) using facility daemon (see
the log option below). When specified on the command line or in
the global context of the /etc/ppp/pppoe file, this option also
sets the daemon's default (non-service-related) detail level.

device device-list

Specify the devices on which the service is available. The
device-list is a comma-separated list of logical device names
(without the leading /dev/), such as hme0. This option is ignored
if encountered in the per-device /etc/ppp/pppoe.device files.

extra string

Specifies extra options to pppd(8). It defaults to "plugin
pppoe.so directtty" and usually does not need to be overridden.

file path

Suspends parsing of the current file, returns to global mode, and
reads options from path. This file must be present and readable;
if it is not, an error is logged. When the end of that file is
reached, processing returns to the current file and the mode is
reset to global again.

The global mode options specified in files read by this command
use the options set in the current file's global mode; this
condition extends to any file included by those files. All files
read are parsed as though the command line had specified this
option, and thus inherit the command line's global modes.

This option can be used to revert to global mode at any point in
an option file by specifying file /dev/null.

group name

Specifies the group ID (symbolic or numeric) under which pppd is
executed. If pppoed is not run as root, this option is ignored.

log path

Specifies an alternate debug logging file. Debug messages are
sent to this file instead of syslog. The special name syslog is
recognized to switch logging back to syslog. When specified on
the command line or in the global context of the /etc/ppp/pppoe
file, this option also sets the daemon's default (non-service-
related) log file.

nodebug

Set debug logging detail level to 0 (no logging). When specified
on the command line or in the global context of the
/etc/ppp/pppoe file, this option also sets the daemon's default
(non-service-related) detail level.

nowildcard

Specifies that the current service should not be included in
response to clients requesting "any" service. The client must ask
for this service by name. When specified on the command line or
in the global context of the /etc/ppp/pppoe file, this option
causes pppoed to ignore all wildcard service requests.

path path

Specifies the path to the pppd executable. Defaults to
/usr/bin/pppd.

pppd string

Passes command-line arguments to pppd. It can be used to set the
IP addresses or configure security for the session. The default
value is the empty string.

server string

Specifies the PPPoE Access Concentrator name to be sent to the
client. It defaults to "Solaris PPPoE".

service name

Closes any service being defined and begins definition of a new
service. The same service name can be used without conflict on
multiple devices. If the same service name is used on a single
device, then the last definition encountered during parsing
overrides all previous definitions.

user name

Specifies the user ID, symbolic or numeric, under which pppd is
executed. If pppoed is not run as root, this option is ignored.

wildcard

Specifies that the service should be included in responses to
client queries that request "any" service, which is done by
requesting a service name of length zero. When specified on the
command line or in the global context of the /etc/ppp/pppoe file,
this option causes pppoed to ignore all wildcard service
requests. This is the default.

EXAMPLES

Example 1: Configuring for Particular Services

In the /etc/ppp/pppoe file:

service internet
device $DEV
pppd "proxyarp 192.168.1.1:"
service debugging
device hme0,$DEV
pppd "debug proxyarp 192.168.1.1:"

You then invoke the daemon with:

example% /usr/lib/inet/pppoed DEV=eri0

The lines in /etc/ppp/pppoe and the preceding command result in
offering services "internet" and "debugging" (and responding to
wildcard queries) on interface eri0, and offering only service
"debugging" on interface hme0.

SIGNALS

The pppoed daemon responds to the following signals:

SIGHUP
Causes pppoed to reparse the original command line and all
configuration files, and close and reopen any log files.

SIGINT
Causes a snapshot of the state of the pppoed daemon to be
written to /tmp/pppoed.pid (where pid is the decimal
process ID of the daemon).

FILES

/usr/lib/inet/pppoed
executable command

/dev/sppptun
Solaris PPP tunneling device driver

/etc/ppp/pppoe
main configuration option file

/etc/ppp/pppoe.device
per-device configuration option file

/etc/ppp/pppoe-errors
location of output from pppd's stderr

/etc/ppp/pppoe.if
list of Ethernet interfaces to be plumbed at
boot time

/tmp/pppoed.pid
ASCII text file containing dumped pppoed
state information

NOTES

Because pppd is installed setuid root, this daemon need not be run as
root. However, if it is not run as root, the user and group options
are ignored.

The Ethernet interfaces to be used must be plumbed for PPPoE using
the sppptun(8) utility before services can be offered.

The daemon operate runs even if there are no services to offer. If
you want to modify a configuration, it is not necessary to terminate
the daemon. Simply use pkill -HUP pppoed after updating the
configuration files.

The PPPoE protocol is far from perfect. Because it runs directly over
Ethernet, there is no possibility of security and the MTU is limited
to 1492 (violating RFC 1661's default value of 1500). It is also not
possible to run the client and the server of a given session on a
single machine with a single Ethernet interface for testing purposes.
The client and server portions of a single session must be run on
separate Ethernet interfaces with different MAC addresses.

January 6, 2003 PPPOED(8)