.\" $OpenBSD: rebound.8,v 1.9 2018/01/12 04:36:45 deraadt Exp $
.\"
.\"Copyright (c) 2015 Ted Unangst <tedu@openbsd.org>
.\"
.\"Permission to use, copy, modify, and distribute this software for any
.\"purpose with or without fee is hereby granted, provided that the above
.\"copyright notice and this permission notice appear in all copies.
.\"
.\"THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
.\"WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
.\"MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
.\"ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
.\"WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
.\"ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\"OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.Dd $Mdocdate: January 12 2018 $
.Dt REBOUND 8
.Os
.Sh NAME
.Nm rebound
.Nd DNS proxy
.Sh SYNOPSIS
.Nm rebound
.Op Fl d
.Op Fl c Ar config
.Op Fl l Ar address
.Sh DESCRIPTION
The
.Nm
daemon proxies DNS requests.
It listens by default on localhost and forwards queries to another server.
.Pp
When
.Nm
starts, it sets the
.Dv kern.dnsjackport
.Xr sysctl 2
which enables it to intercept all DNS traffic.
.Pp
If sent a
.Dv SIGUSR1
signal,
.Nm
logs statistics about the running daemon to
.Pa /var/log/daemon .
.Pp
The options are as follows:
.Bl -tag -width Ds
.It Fl c Ar config
Specify an alternative configuration file, instead of the default
.Pa /etc/resolv.conf .
.Nm
will reload the configuration file when sent a SIGHUP signal.
.It Fl d
Debug mode.
.Nm
does not
.Xr fork 2
into the background.
.It Fl l Ar address
Listen for connections by binding to
.Ar address ,
an IP specified in dotted quad notation, instead of the default of localhost.
.El
.Sh FILES
.Bl -tag -width "/etc/resolv.confXX" -compact
.It Pa /etc/resolv.conf
Default
.Nm
configuration file.
.El
.Sh SEE ALSO
.Xr resolv.conf 5 ,
.Xr unbound 8
.Sh HISTORY
The
.Nm
daemon first appeared in
.Ox 5.9 .
.Sh AUTHORS
.An Ted Unangst Aq Mt tedu@openbsd.org