RARPD.8
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- .TH RARPD 8
- .SH NAME
- rarpd - reverse address resolution protocol daemon
- .SH SYNOPSIS
- .B rarpd
- .RB [ -d ]
- .SH DESCRIPTION
- .B Rarpd
- listens on the ethernet for broadcast packets asking for reverse address
- resolution. These packets are sent by hosts at boot time to find out their
- IP address.
- .B Rarpd
- looks up the six octet ethernet number in the
- .B /etc/ethers
- file finding a host name. This name is translated to the IP address of the
- host by a DNS lookup. The IP address is then sent to the host.
- .PP
- Before
- .B rarpd
- can start its service it first finds out what the IP addresses of the
- ethernets are. It will look through
- .B /etc/ethers
- to map the ethernet addresses to host names. It then uses
- .B /etc/hosts
- to map the host names to IP addresses. If this lookup fails then several
- RARP requests are broadcasted in the hope that some RARP server knows the
- addresses. The IP addresses are eventually set in the same way as
- .BR ifconfig (8).
- (The address is not changed if already set with
- .BR ifconfig .)
- Note that the host names in the ethers and hosts files must match exactly.
- The DNS can not be used yet, so a simple name can't be translated to a fully
- qualified name.
- .PP
- .B Rarpd
- exits after startup if there are no active ethernets, or if there is no
- ethers file.
- .PP
- .B Warning!
- Sun diskless workstations assume that the first RARP server that answers is
- the host they are to boot from. For this to work all other Sun RARP servers
- delay their answer if they are not also the requestors boot server. The
- Minix
- .B rarpd
- does not have this kludge so it will happily engage the Sun boot server to
- see who can answer the client first. Unless your Minix host can actually
- serve a Sun diskless client, it is better not to list any more hosts in the
- ethers file than necessary.
- .SH OPTIONS
- .TP
- .B -d
- Turns on debugging messages. Debugging can also be turned on at runtime by
- sending signal
- .B SIGUSR1
- or turned off with
- .BR SIGUSR2 .
- .SH "SEE ALSO"
- .BR ifconfig (8),
- .BR ethers (5),
- .BR hosts (5),
- .BR set_net_default (8),
- .BR boot (8),
- .BR inetd (8),
- .BR irdpd (8),
- .BR nonamed (8).
- .SH AUTHOR
- Kees J. Bot (kjb@cs.vu.nl)