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rarpd(8)


NAME

  rarpd - Reverse address resolution protocol (RARP) daemon


SYNOPSIS

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


OPTIONS

  interface
      Specifies the system's network interface.

  -v  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.

  -n  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.

  -f filename
      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 interface 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:

       PACKETFILTER is not configured in /vmunix


FILES

  /etc/ethers
      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)

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