1.\" $OpenBSD: rarpd.8,v 1.21 2015/10/28 10:02:59 jmc Exp $ 2.\" $NetBSD: rarpd.8,v 1.7 1998/04/15 15:06:06 mrg Exp $ 3.\" 4.\" Copyright (c) 1988-1990 The Regents of the University of California. 5.\" All rights reserved. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that: (1) source code distributions 9.\" retain the above copyright notice and this paragraph in its entirety, (2) 10.\" distributions including binary code include the above copyright notice and 11.\" this paragraph in its entirety in the documentation or other materials 12.\" provided with the distribution, and (3) all advertising materials mentioning 13.\" features or use of this software display the following acknowledgement: 14.\" ``This product includes software developed by the University of California, 15.\" Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 16.\" the University nor the names of its contributors may be used to endorse 17.\" or promote products derived from this software without specific prior 18.\" written permission. 19.\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 20.\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 21.\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 22.\" @(#) $Id: rarpd.8,v 1.21 2015/10/28 10:02:59 jmc Exp $ 23.\" 24.Dd $Mdocdate: October 28 2015 $ 25.Dt RARPD 8 26.Os 27.Sh NAME 28.Nm rarpd 29.Nd reverse ARP daemon 30.Sh SYNOPSIS 31.Nm rarpd 32.Op Fl adflt 33.Ar if0 Op Ar ... ifN 34.Sh DESCRIPTION 35.Nm 36services Reverse ARP requests on the Ethernet connected to 37the specified interfaces. 38Upon receiving a request, 39.Nm 40maps the target hardware address to an IP address via its name, which 41must be present in both the 42.Xr ethers 5 43and 44.Xr hosts 5 45databases. 46If a host does not exist in both databases, the translation cannot 47proceed and a reply will not be sent. 48.Pp 49In normal operation, 50.Nm 51forks a copy of itself and runs in the background. 52Anomalies and errors are reported via 53.Xr syslog 3 . 54.Pp 55The options are as follows: 56.Bl -tag -width Ds 57.It Fl a 58Listen on all the Ethernets attached to the system. 59If 60.Fl a 61is omitted, a list of interfaces must be specified. 62.It Fl d 63Run in debug mode, with all the output to stderr. 64This option implies the 65.Fl f 66option. 67.It Fl f 68Run in the foreground. 69.It Fl l 70Log all requests to 71.Xr syslog 3 . 72.It Fl t 73Only honour a request if the server 74(the host that 75.Nm 76is running on) 77can "boot" the target; that is, if a file or directory called 78.Pa /tftpboot/ipaddr 79exists, where 80.Pa ipaddr 81is the target IP address expressed in uppercase hexadecimal 82(only the first 8 characters of filenames are checked). 83.El 84.Sh FILES 85.Bl -tag -width /etc/ethers -compact 86.It Pa /etc/ethers 87Ethernet host name database. 88.It Pa /etc/hosts 89Host name database. 90.\" .It Pa /tftpboot 91.El 92.Sh SEE ALSO 93.Xr bpf 4 , 94.Xr diskless 8 95.Sh STANDARDS 96.Rs 97.%A R. Finlayson 98.%A T. Mann 99.%A J. Mogul 100.%A M. Theimer 101.%D June 1984 102.%R RFC 903 103.%T A Reverse Address Resolution Protocol 104.Re 105.Sh AUTHORS 106.An -nosplit 107.An Craig Leres Aq Mt leres@ee.lbl.gov 108and 109.An Steven McCanne Aq Mt mccanne@ee.lbl.gov , 110Lawrence Berkeley Laboratory, University of California, Berkeley, CA. 111