.\" manual page [] for pppd 2.4
-.\" $Id: pppd.8,v 1.55 2001/02/22 03:10:05 paulus Exp $
+.\" $Id: pppd.8,v 1.65 2002/09/20 06:53:19 fcusack Exp $
.\" SH section heading
.\" SS subsection heading
.\" LP paragraph
\fBether\fR and \fBarp\fR, are not permitted. Generally the filter
expression should be enclosed in single-quotes to prevent whitespace
in the expression from being interpreted by the shell. This option
-is currently only available under NetBSD, and then only
+is currently only available under NetBSD or Linux, and then only
if both the kernel and pppd were compiled with PPP_FILTER defined.
.TP
.B allow-ip \fIaddress(es)
and as the default name to send to the peer when authenticating itself
to the peer. This option is privileged.
.TP
+.B dryrun
+With the \fBdryrun\fR option, pppd will print out all the option
+values which have been set and then exit, after parsing the command
+line and options files and checking the option values, but before
+initiating the link. The option values are logged at level info, and
+also printed to standard output unless the device on standard output
+is the device that pppd would be using to communicate with the peer.
+.TP
+.B dump
+With the \fBdump\fR option, pppd will print out all the option values
+which have been set. This option is like the \fBdryrun\fR option
+except that pppd proceeds as normal rather than exiting.
+.TP
.B endpoint \fI<epdisc>
Sets the endpoint discriminator sent by the local machine to the peer
during multilink negotiation to \fI<epdisc>\fR. The default is to use
.TP
.B kdebug \fIn
Enable debugging code in the kernel-level PPP driver. The argument
-\fIn\fR is a number which is the sum of the following values: 1 to
+values depend on the specific kernel driver, but in general a value of
+1 will enable general kernel debug messages. (Note that these
+messages are usually only useful for debugging the kernel driver
+itself.) For the Linux 2.2.x kernel driver, the value is a sum of
+bits: 1 to
enable general debug messages, 2 to request that the contents of
received packets be printed, and 4 to request that the contents of
transmitted packets be printed. On most systems, messages printed by
Enables the use of PPP multilink; this is an alias for the `multilink'
option. This option is currently only available under Linux.
.TP
+.B mppe-stateful
+Allow MPPE to use stateful mode. Stateless mode is still attempted first.
+The default is to disallow stateful mode.
+.TP
.B mpshortseq
Enables the use of short (12-bit) sequence numbers in multilink
headers, as opposed to 24-bit sequence numbers. This option is only
Disables the use of PPP multilink. This option is currently only
available under Linux.
.TP
+.B nomppe
+Disables MPPE (Microsoft Point to Point Encryption). This is the default.
+.TP
+.B nomppe-40
+Disable 40\-bit encryption with MPPE.
+.TP
+.B nomppe-128
+Disable 128\-bit encryption with MPPE.
+.TP
+.B nomppe-stateful
+Disable MPPE stateful mode. This is the default.
+.TP
.B nompshortseq
Disables the use of short (12-bit) sequence numbers in the PPP
multilink protocol, forcing the use of 24-bit sequence numbers. This
.TP
.B persist
Do not exit after a connection is terminated; instead try to reopen
-the connection.
+the connection. The \fBmaxfail\fR option still has an effect on
+persistent connections.
.TP
.B plugin \fIfilename
Load the shared library object file \fIfilename\fR as a plugin. This
-is a privileged option.
+is a privileged option. If \fIfilename\fR does not contain a slash
+(/), pppd will look in the \fB/usr/lib/pppd/\fIversion\fR directory
+for the plugin, where
+\fIversion\fR is the version number of pppd (for example, 2.4.2).
.TP
.B predictor1
Request that the peer compress frames that it sends using Predictor-1
With this option, pppd will not agree to authenticate itself to the
peer using CHAP.
.TP
+.B refuse-mschap
+With this option, pppd will not agree to authenticate itself to the
+peer using MS-CHAP.
+.TP
+.B refuse-mschap-v2
+With this option, pppd will not agree to authenticate itself to the
+peer using MS-CHAPv2.
+.TP
.B refuse-pap
With this option, pppd will not agree to authenticate itself to the
peer using PAP.
Require the peer to authenticate itself using CHAP [Challenge
Handshake Authentication Protocol] authentication.
.TP
+.B require-mppe
+Require the use of MPPE (Microsoft Point to Point Encryption). This
+option disables all other compression types. This option enables
+both 40\-bit and 128\-bit encryption. In order for MPPE to successfully
+come up, you must have authenticated with either MS-CHAP or MS-CHAPv2.
+This option is presently only supported under Linux, and only if your
+kernel has been configured to include MPPE support.
+.TP
+.B require-mppe-40
+Require the use of MPPE, with 40\-bit encryption.
+.TP
+.B require-mppe-128
+Require the use of MPPE, with 128\-bit encryption.
+.TP
+.B require-mschap
+Require the peer to authenticate itself using MS-CHAP [Microsft Challenge
+Handshake Authentication Protocol] authentication.
+.TP
+.B require-mschap-v2
+Require the peer to authenticate itself using MS-CHAPv2 [Microsft Challenge
+Handshake Authentication Protocol, Version 2] authentication.
+.TP
.B require-pap
Require the peer to authenticate itself using PAP [Password
Authentication Protocol] authentication.
if it has no secrets which could be used to do so.
.LP
Pppd stores secrets for use in authentication in secrets
-files (/etc/ppp/pap-secrets for PAP, /etc/ppp/chap-secrets for CHAP).
+files (/etc/ppp/pap-secrets for PAP, /etc/ppp/chap-secrets for
+CHAP/MS-CHAP/MS-CHAPv2).
Both secrets files have the same format. The secrets files can
contain secrets for pppd to use in authenticating itself to other
systems, as well as secrets for pppd to use when authenticating other
.B /var/run/ppp\fIn\fB.pid \fR(BSD or Linux), \fB/etc/ppp/ppp\fIn\fB.pid \fR(others)
Process-ID for pppd process on ppp interface unit \fIn\fR.
.TP
-.B /var/run/ppp-\fIname\fB.pid \fR(BSD or Linux), \fB/etc/ppp/ppp-\fIname\fB.pid \fR(others)
+.B /var/run/ppp-\fIname\fB.pid \fR(BSD or Linux),
+\fB/etc/ppp/ppp-\fIname\fB.pid \fR(others)
Process-ID for pppd process for logical link \fIname\fR (see the
\fIlinkname\fR option).
.TP
user. Pppd will log a warning if this is not the case.
.TP
.B /etc/ppp/chap-secrets
-Names, secrets and IP addresses for CHAP authentication. As for
-/etc/ppp/pap-secrets, this file should be owned by root and not
+Names, secrets and IP addresses for CHAP/MS-CHAP/MS-CHAPv2 authentication.
+As for /etc/ppp/pap-secrets, this file should be owned by root and not
readable or writable by any other user. Pppd will log a warning if
this is not the case.
.TP
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