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rpcbind(1M)							   rpcbind(1M)

NAME    [Toc]    [Back]

     rpcbind - universal addresses to RPC program number mapper

SYNOPSIS    [Toc]    [Back]

     /usr/etc/rpcbind [	-mvC ] [ -f forkcnt ] [	-a mask,match |	-a match ]

DESCRIPTION    [Toc]    [Back]

     rpcbind is	a server that converts RPC program numbers into	universal
     addresses.	 It must be running to make RPC	calls.

     When an RPC service is started, it	will tell rpcbind at what address it
     is	listening, and what RPC	program	numbers	it is prepared to serve.  When
     a client wishes to	make an	RPC call to a given program number, it will
     first contact rpcbind on the server machine to determine the address
     where RPC packets should be sent.

     Normally, standard	RPC servers are	started	by port	monitors, so rpcbind
     must be started before port monitors are invoked.

     rpcbind is	restricted to users with the root user ID.

     Options to	customize rpcbind's behavior are read from the file
     /etc/config/rpcbind.options during	system initialization.	The options

     -m	  Enable reception of RPC requests sent	to rpcbind's multicast

     -v	  Turn on verbose mode.	 In this mode, additional debugging and	error
	  information is printed to stderr.

     -C	  Turn on compatibility	mode.  This will allow local applications to
	  register with	rpcbind	using a	network	address	other than the
	  loopback address.  Applications that do not use the SGI-provided RPC
	  interfaces to	register with rpcbind may require this option to
	  function properly.  However, use of this option will also introduce
	  a known security problem.

     -f	 forkcnt
	  Ignored by rpcbind. It is supplied to	provide	command	line
	  compatibility	with portmap.

     -w	  When rpcbind receives	a SIGINT signal, it saves a copy of its
	  configuration	in /tmp/rpcbind.file. The -w switch causes rpcbind to
	  warm start and preconfigure itself from this file when it is

     -a	 mask,match

     -a	 match
	  This option permits restriction of most of the rpcbind services to a
	  subset of hosts or networks. (The rpcbind null procedure is not
	  restricted.)	The mask, and match arguments are IP addresses in

									Page 1

rpcbind(1M)							   rpcbind(1M)

	  Internet dot notation	(see inet(3N)) that represent masks, hosts or
	  networks.  The mask and match	arguments must be separated by a comma
	  with no intervening whitespace.  If mask and the comma are missing,
	  the argument is interpreted as a Class A, B, or C network number and
	  the mask is set to the value appropriate for the network's class.

	  The -a option	can be repeated	up to 50 times.	 For each mask and
	  match	specified, the requesting client host's	address	is logicallyANDed
	with mask; if the result equals	match, the client's request is
	  processed.  If none of the mask-match	comparisons succeed, the
	  request is rejected.	Requests from all of the local host's
	  addresses are	always permitted.

     -A	  This option is equivalent to a series	of -a options listing all of
	  the addresses	of interfaces on the machine, with their netmasks.  It
	  is convenient	for authorizing	hosts on directly connected networks
	  and point-to-point links without explicitly enumerating the
	  networks.  The restrictions defined by -A do not count against the
	  limit	of 50 -a options.

     For example, if /etc/config/rpcbind.options contains


     access is restricted to any host on the Class B 128.32.199	subnet or the
     Class C 192.0.2 network or	to the host with the address.
     Requests from clients on any other	networks will be rejected.

NOTES    [Toc]    [Back]

     If	rpcbind	crashes, all RPC servers must be restarted.

SEE ALSO    [Toc]    [Back]

     rpcinfo(1M), portmap(1M)

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