rarpd man page on DigitalUNIX

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rarpd(8)							      rarpd(8)

       rarpd - Reverse address resolution protocol (RARP) daemon

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

       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.

       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.

       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.

       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

       Database that maps Ethernet addresses to hostnames

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

       Routines: ethers(3)

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


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