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	1	.\"
	2	.\" Copyright (c) 1988-1990 The Regents of the University of California.
	3	.\" All rights reserved.
	4	.\"
	5	.\" Redistribution and use in source and binary forms, with or without
	6	.\" modification, are permitted provided that: (1) source code distributions
	7	.\" retain the above copyright notice and this paragraph in its entirety, (2)
	8	.\" distributions including binary code include the above copyright notice and
	9	.\" this paragraph in its entirety in the documentation or other materials
	10	.\" provided with the distribution, and (3) all advertising materials mentioning
	11	.\" features or use of this software display the following acknowledgement:
	12	.\" ``This product includes software developed by the University of California,
	13	.\" Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
	14	.\" the University nor the names of its contributors may be used to endorse
	15	.\" or promote products derived from this software without specific prior
	16	.\" written permission.
	17	.\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
	18	.\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
	19	.\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
	20	.\" @(#) $Id: rarpd.8,v 1.1.1.1 1999/05/02 03:57:59 wsanchez Exp $
	21	.\"
	22	.Dd October 26, 1990
	23	.Dt RARPD 8
	24	.Sh NAME
	25	.Nm rarpd
	26	.Nd Reverse ARP Daemon
	27	.Sh SYNOPSIS
	28	.Nm rarpd
	29	.Op Fl adf
	30	.Op Ar interface
	31	.Sh DESCRIPTION
	32	.Nm Rarpd
	33	services Reverse ARP requests on the Ethernet connected to
	34	.Ar interface.
	35	Upon receiving a request,
	36	.Nm rarpd
	37	maps the target hardware address to an IP address via its name, which
	38	must be present in both the
	39	.Xr ethers 5
	40	and
	41	.Xr hosts 5
	42	databases.
	43	If a host does not exist in both databases, the translation cannot
	44	proceed and a reply will not be sent.
	45	.Pp
	46	Additionally, a request is honored only if the server
	47	(i.e., the host that rarpd is running on)
	48	can "boot" the target; that is, if the directory
	49	.Pa /tftpboot/ Ns Em ipaddr
	50	exists, where
	51	.Rm ipaddr
	52	is the target IP address.
	53	.Pp
	54	In normal operation,
	55	.Nm rarpd
	56	forks a copy of itself and runs in
	57	the background. Anomalies and errors are reported via
	58	.Xr syslog 3 .
	59	.Sh OPTIONS
	60	.Bl -tag -width indent
	61	.It Fl a
	62	Listen on all the Ethernets attached to the system.
	63	If
	64	.Sq Fl a
	65	is omitted, an interface must be specified.
	66	.It Fl d
	67	Run in debug mode, with all the output to stderr.
	68	This option implies the
	69	.Fl f
	70	option.
	71	.It Fl f
	72	Run in the foreground.
	73	.El
	74	.Sh FILES
	75	.Bl -tag -width Pa -compact
	76	.It Pa /etc/ethers
	77	.It Pa /etc/hosts
	78	.It Pa /tftpboot
	79	.El
	80	.Sh SEE ALSO
	81	.Xr bpf 4 ,
	82	.Rs
	83	.%R A Reverse Address Resolution Protocol
	84	.%N RFC 903
	85	.%A Finlayson, R.
	86	.%A Mann, T.
	87	.%A Mogul, J.C.
	88	.%A Theimer, M.
	89	.Re
	90	.Sh AUTHORS
	91	Craig Leres (leres@ee.lbl.gov) and Steven McCanne (mccanne@ee.lbl.gov).
	92	Lawrence Berkeley Laboratory, University of California, Berkeley, CA.