rarpd man page on FreeBSD

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

     rarpd — reverse ARP daemon

     rarpd -a [-dfsv] [-t directory]
     rarpd [-dfsv] [-t directory] interface

     The rarpd utility services Reverse ARP requests on the Ethernet connected
     to interface.  Upon receiving a request, rarpd maps the target hardware
     address to an IP address via its name, which must be present in both the
     ethers(5) and hosts(5) databases.	If a host does not exist in both data‐
     bases, the translation cannot proceed and a reply will not be sent.

     By default, a request is honored only if the server (i.e., the host that
     rarpd is running on) can "boot" the target; that is, a file or directory
     matching the glob /tftpboot/ipaddr* exists, where ipaddr is the target IP
     address in hex.  For example, the IP address will be
     replied to if any of /tftpboot/CCD81B12, /tftpboot/CCD81B12.SUN3, or
     /tftpboot/CCD81B12-boot exist.  This requirement can be overridden with
     the -s flag (see below).

     In normal operation, rarpd forks a copy of itself and runs in the back‐
     ground.  Anomalies and errors are reported via syslog(3).

     The following options are available:

     -a	     Listen on all the Ethernets attached to the system.  If -a is
	     omitted, an interface must be specified.

     -d	     If -f is also specified, rarpd logs messages to stdout and stderr
	     instead of via syslog(3).

     -f	     Run in the foreground.

     -s	     Supply a response to any RARP request for which an ethernet to IP
	     address mapping exists; do not depend on the existence of

     -t	     Supply an alternate tftp root directory to /tftpboot, similar to
	     the -s option of tftpd(8).	 This permits rarpd to selectively
	     respond to RARP requests, but use an alternate directory for IP

     -v	     Enable verbose syslogging.



     Finlayson, R., Mann, T., Mogul, J.C., and Theimer, M., RFC 903: Reverse
     Address Resolution Protocol, June 1984, 4 p.

     Craig Leres ⟨leres@ee.lbl.gov⟩ and Steven McCanne ⟨mccanne@ee.lbl.gov⟩.
     Lawrence Berkeley Laboratory, University of California, Berkeley, CA.

     The rarpd utility can depend on the DNS to resolve the name discovered
     from /etc/ethers.	If this name is not in the DNS but is in /etc/hosts,
     the DNS lookup can cause a delayed RARP response, so in this situation it
     is recommended to configure nsswitch.conf(5) to read /etc/hosts first.

BSD			       November 16, 2001			   BSD

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