.TH RARP 8 "7 April 2000" "rarpd" "Linux Programmer's Manual"
.SH NAME
rarpd \- Reverse Address Resolution Protocol (RARP) daemon
.SH SYNOPSIS
.B rarpd
.RB [\| \-aAvode \|]
.RB [\| \-b
.IR bootdir \|]
.RI [\| interface \|]
.SH DESCRIPTION
.B Rarpd
is a daemon which responds to RARP requests.
RARP is used by some machines at boot time to discover their IP address.
They provide their Ethernet address and
.B rarpd
responds with their IP address if it finds it in the ethers database
(either
.I /etc/ethers
file or NIS+ lookup) and using DNS lookup if ethers database
contains a hostname and not an IP address.
By default
.B rarpd
also checks if a bootable image with a name starting with the IP address
in hexadecimal uppercase letters is present in the TFTP boot directory
(usually
.I /tftpboot
) before it decides to respond to the RARP request.
.PP
The optional argument \fIinterface\fR restricts the daemon instance
to access only the indicated network interface. Only a single name
is possible.
.SH OPTIONS
.TP
.B \-a
Do not bind to the interface.
.TP
.B \-A
Respond to ARP as well as RARP requests.
.TP
.B \-v
Tell the user what is going on by being verbose.
.TP
.B \-d
Debugging mode. Do not detach from the tty. This also
implies verbose mode.
.TP
.B \-e
Skip the check for bootable image in the TFTP boot directory. If not
present, then even if the Ethernet address is present in
the ethers database but the bootable image for the resolved IP does not exist,
.B rarpd
will not respond to the request.
.TP
.B \-o
Accept offlink packages on the active interfaces.
.TP
.B \-b \fIbootdir\fR
Access
.I bootdir
instead of the default
.I /tftpboot
as the TFTP boot directory for bootable image checks.
.SH OBSOLETES
This daemon
.B rarpd
obsoletes kernel
.B rarp
daemon present in Linux kernels up to 2.2 which was controlled by the
rarp(8) command.
.SH SIGNALS
.TP
.B SIGHUP
Renew the internal address list, which records IPv4 addresses available
at each active network interface. The restriction set by the command
line argument \fIinterface\fR is still in effect, if in use.
.SH FILES
.I /etc/ethers,
.br
.I /etc/nsswitch.conf,
.br
.I /tftpboot
.SH SEE ALSO
ethers(5)
.SH AUTHORS
Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
.br
Jakub Jelinek, <jakub@redhat.com>