rpcbind(8) — Linux manual page


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

NAME         top

     rpcbind — universal addresses to RPC program number mapper

SYNOPSIS         top

     rpcbind [-adhiLls]

DESCRIPTION         top

     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 trans‐
     lation-calls function correctly.  If they fail, the network configura‐
     tion databases may be corrupt.  Since RPC services cannot function cor‐
     rectly in this situation, rpcbind reports the condition and terminates.

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

OPTIONS         top

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

     -d      Run in debug mode.  In this mode, rpcbind will log 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.

     -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 can be used to
             restrict the interfaces rpcbind will respond to.  When specify‐
             ing IP addresses with -h, rpcbind will automatically add
    and if IPv6 is enabled, ::1 to the list.  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 different IP address than it was
             sent to.  Note that when rpcbind is controlled via systemd's
             socket activation, the -h option is ignored. In this case, you
             need to edit the ListenStream and ListenDgram definitions in
             /usr/lib/systemd/system/rpcbind.socket instead.

     -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

     -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 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 ter‐

NOTES         top

     All RPC servers must be restarted if rpcbind is restarted.

SEE ALSO         top


LINUX PORT         top

COLOPHON         top

     This page is part of the rpcbind (convert RPC numbers to universal
     addresses) project.  Information about the project can be found at
     http://sourceforge.net/projects/rpcbind/.  If you have a bug report for
     this manual page, see
     ⟨http://sourceforge.net/p/rpcbind/bugs/?source=navbar⟩.  This page was
     obtained from the project's upstream Git repository
     ⟨git://linux-nfs.org/~steved/rpcbind⟩ on 2020-08-13.  (At that time,
     the date of the most recent commit that was found in the repository was
     2020-06-09.)  If you discover any rendering problems in this HTML ver‐
     sion of the page, or you believe there is a better or more up-to-date
     source for the page, or you have corrections or improvements to the
     information in this COLOPHON (which is not part of the original manual
     page), send a mail to man-pages@man7.org

BSD                          September 14, 1992                          BSD

Pages that refer to this page: rpc.statd(8)statd(8)