.\"	$OpenBSD: npppd.8,v 1.8 2023/03/02 17:09:54 jmc Exp $
.\"
.\" Copyright (c) 2012 YASUOKA Masahiko <yasuoka@openbsd.org>
.\"
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.\" The following requests are required for all man pages.
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.Dd $Mdocdate: March 2 2023 $
.Dt NPPPD 8
.Os
.Sh NAME
.Nm npppd
.Nd new Point-to-Point Protocol (PPP) daemon
.Sh SYNOPSIS
.Nm npppd
.Op Fl dn
.Op Fl f Ar config_file
.Sh DESCRIPTION
.Nm
is a Point-to-Point Protocol (PPP) and tunneling daemon
capable of L2TP, PPTP, and PPPoE.
.Bl -tag -width Ds
.It Fl d
Do not daemonize.
If this option is specified,
.Nm
will run in the foreground and log to
.Em stderr .
.It Fl f Ar config_file
Specify an alternative configuration file.
.It Fl n
Configtest mode.
Only check the configuration file for validity.
.El
.Pp
Normally
.Nm
works with
.Xr pipex 4
to accelerate IP packet forwarding, but
.Xr pipex 4
is disabled by default.
To enable it, set
.Va net.pipex.enable
to
.Sq 1
using
.Xr sysctl 8 .
.Pp
When
.Nm
uses PPTP,
the host system should allow GRE packets, but they are disabled by default.
To enable GRE, set
.Va net.inet.gre.allow
to
.Sq 1
using
.Xr sysctl 8 .
.Sh FILES
.Bl -tag -width "/etc/npppd/npppd.confXXX" -compact
.It Pa /etc/npppd/npppd.conf
Default
.Nm
configuration file.
.El
.Sh SEE ALSO
.Xr gre 4 ,
.Xr pipex 4 ,
.Xr pppx 4 ,
.Xr npppd.conf 5 ,
.Xr npppctl 8 ,
.Xr sysctl 8
.Sh HISTORY
The
.Nm
program first appeared in
.Ox
5.3.
.Sh AUTHORS
The
.Nm
program was written by Internet Initiative Japan Inc.
.Sh BUGS
If
.Ic l2tp-require-ipsec
is set to
.Dq yes
with an L2TP tunnel,
all incoming L2TP/IPsec packets are dropped.