rarpd(8) [minix man page]

RARPD(8)						      System Manager's Manual							  RARPD(8)

NAME

       rarpd - reverse address resolution protocol daemon

SYNOPSIS

       rarpd [-d]

DESCRIPTION

       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.  Rarpd looks up the six octet ethernet number in the /etc/ethers file finding a host name.  This name is  trans-
       lated to the IP address of the host by a DNS lookup.  The IP address is then sent to the host.

       Before  rarpd can start its service it first finds out what the IP addresses of the ethernets are.  It will look through /etc/ethers to map
       the ethernet addresses to host names.  It then uses /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 ifconfig(8).	(The address is not changed if already set with 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.

       Rarpd exits after startup if there are no active ethernets, or if there is no ethers file.

       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 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.

OPTIONS

       -d     Turns on debugging messages.  Debugging can also be turned on at runtime by sending signal SIGUSR1 or turned off with SIGUSR2.

SEE ALSO

       ifconfig(8), ethers(5), hosts(5), set_net_default(8), boot(8), inetd(8), irdpd(8), nonamed(8).

AUTHOR

       Kees J. Bot (kjb@cs.vu.nl)

																	  RARPD(8)

rarpd(8)						      System Manager's Manual							  rarpd(8)

NAME

       rarpd - Reverse address resolution protocol (RARP) daemon

SYNOPSIS

       /usr/sbin/rarpd [interface] [-v] [-n] [-f filename]

OPTIONS

       Specifies  the  system's  network  interface.   Causes  rarpd  to operate in verbose mode.  This option logs details of RARP to syslog. The
       instance of a RARP request and its response are also logged.  Disables checking of the ethers(4) file.  By default, rarpd checks the ethers
       file  once  every  ten  minutes,  and,  if  the	file  was  modified,  rarpd rereads the file. If you specify the -n option rarpd scans the
       /etc/ethers file once at startup time.  Reads an alternate Ethernet address file.

DESCRIPTION

       The rarpd daemon maps the Ethernet address of a machine to the machine's Internet Protocol (IP) address.

       When rarpd is invoked, it reads the /etc/ethers file (by default) and waits to process a RARP request.  The  /etc/ethers  file  is  checked
       every  ten  minutes for any changes.  If the file has been modified, rarpd reads it again. You can disable this feature with the -n option.
       You can force a scan of the /etc/ethers file by sending the rarpd daemon a SIGHUP signal.  See signal(2) for more information on SIGHUP.

       The format of the /etc/ethers file is described in ethers(4). You can specify a file other than /etc/ethers with the -f option.	The inter-
       face is the network interface on which the rarpd daemon should listen. The command netstat -i shows the correct interface or interfaces for
       your system. The rarpd daemon uses the first interface it finds, if you do not specify an interface.  See the netstat(1) reference page for
       more information.

       Because	the  rarpd  daemon has been implemented with the Ethernet Packet Filter (see packetfilter(7)), you must configure your kernel with
       the packet filter option in order for rarpd to function properly. The packet filter detects RARP broadcast packets and passes them to rarpd
       for processing. The filter priority for rarpd is set to 28.

       All messages from the rarpd daemon are directed to syslog.

RESTRICTIONS

       The rarpd daemon ignores all ARP requests sent encapsulated within a RARP packet. ARP requests are handled directly by the kernel.

       The machine for which an IP address is being requested must be present in the server's /etc/hosts file.

ERRORS

       If the Packet Filter is not configured in your kernel, the following message is displayed on the console window and logged to syslog: PACK-
       ETFILTER is not configured in /vmunix

FILES

       Database that maps Ethernet addresses to hostnames

SEE ALSO

       Commands: arp(8), ifconfig(8), syslogd(8)

       Routines: ethers(3)

       Files: ethers(4), hosts(4), packetfilter(7)

																	  rarpd(8)