rpcbind(8) — Linux manual page


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

NAME         top

       rpcbind — universal addresses to RPC program number mapper

SYNOPSIS         top


DESCRIPTION         top

       The 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 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 on the server machine to
       determine the address where RPC requests should be sent.

       The utility should be started before any other RPC service.
       Normally, standard RPC servers are started by port monitors, so
       must be started before port monitors are invoked.

       When 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, reports the
       condition and terminates.

       The 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, 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 specifying IP addresses with -h, will
               automatically add and if IPv6 is enabled, ::1
               to the list.  If no -h option is specified, will bind to
               INADDR_ANY, which could lead to problems on a multi-homed
               host due to returning a UDP packet from a different IP
               address than it was sent to.  Note that when 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 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 to change to the user daemon as soon as possible.
               This causes to use non-privileged ports for outgoing
               connections, preventing non-privileged clients from using
               to connect to services from a privileged port.

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

NOTES         top

       All RPC servers must be restarted if 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 2023-12-22.  (At that
       time, the date of the most recent commit that was found in the
       repository was 2022-07-12.)  If you discover any rendering
       problems in this HTML version 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

GNU                        September 14, 1992                 RPCBIND(8)

Pages that refer to this page: statd(8)