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

NAME
     rpcbind -- universal addresses to RPC program number mapper

SYNOPSIS
     rpcbind [-adhiLls]

DESCRIPTION
     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.  Normally, 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 translation-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.

OPTIONS
     -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 trans-
             lation consistency checks are shown in detail.

     -f      Do not fork and become a background process.

     -h      Specify specific IP addresses to bind to for UDP requests.  This option may be specified multiple times and is typ-
             ically necessary when running on a multi-homed host.  If no -h option is specified, rpcbind will bind to
             INADDR_ANY, which could lead to problems on a multi-homed host due to rpcbind returning a UDP packet from a differ-
             ent IP address than it was sent to.  Note that when specifying IP addresses with -h, rpcbind will automatically add
             127.0.0.1 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 interface.

     -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 connections, preventing non-privileged clients from using rpcbind to connect to services from a privi-
             leged 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 terminates.

NOTES
     All RPC servers must be restarted if rpcbind is restarted.

SEE ALSO
     rpcbind(3), rpcinfo(8)

LINUX PORT
BSD                                                    September 14, 1992                                                    BSD