rpcbind manpage

Search topic Section

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

     rpcbind -- universal addresses to RPC program number mapper

     rpcbind [-adhiLls]

     The rpcbind utility is a server that converts RPC program numbers into
     universal addresses.  It must be running on the host to be able to make
     RPC calls on a server on that machine.

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

     The rpcbind utility should be started before any other RPC service.  Nor-
     mally, standard RPC servers are started by port monitors, so rpcbind must
     be started before port monitors are invoked.

     When rpcbind is started, it checks that certain name-to-address transla-
     tion-calls function correctly.  If they fail, the network configuration
     databases may be corrupt.	Since RPC services cannot function correctly
     in this situation, rpcbind reports the condition and terminates.

     The rpcbind utility can only be started by the super-user.

     -a	     When debugging (-d), do an abort on errors.

     -d	     Run in debug mode.	 In this mode, rpcbind will not fork when it
	     starts, will print additional information during operation, and
	     will abort on certain errors if -a is also specified.  With this
	     option, the name-to-address translation consistency checks are
	     shown in detail.

     -h	     Specify specific IP addresses to bind to for UDP requests.	 This
	     option may be specified multiple times and is typically necessary
	     when running on a multi-homed host.  If no -h option is speci-
	     fied, rpcbind will bind to INADDR_ANY, which could lead to prob-
	     lems on a multi-homed host due to rpcbind returning a UDP packet
	     from a different IP address than it was sent to.  Note that when
	     specifying IP addresses with -h, rpcbind will automatically add and if IPv6 is enabled, ::1 to the list.

     -i	     ``Insecure'' mode.	 Allow calls to SET and UNSET from any host.
	     Normally rpcbind accepts these requests only from the loopback
	     interface for security reasons.  This change is necessary for
	     programs that were compiled with earlier versions of the rpc
	     library and do not make those requests using the loopback inter-

     -l	     Turn on libwrap connection logging.

     -s	     Cause rpcbind to change to the user daemon as soon as possible.
	     This causes rpcbind to use non-privileged ports for outgoing con-
	     nections, preventing non-privileged clients from using rpcbind to
	     connect to services from a privileged port.

     -w	     Cause rpcbind to do a "warm start" by read a state file when
	     rpcbind starts up. The state file is created when rpcbind termi-

     All RPC servers must be restarted if rpcbind is restarted.


BSD			      September 14, 1992			   BSD