# rpcbind(8) - man - phpman

[RPCBIND(8)](https://www.chedong.com/phpMan.php/man/RPCBIND/8/markdown)                BSD System Manager's Manual               [RPCBIND(8)](https://www.chedong.com/phpMan.php/man/RPCBIND/8/markdown)

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## NAME
     **rpcbind** — universal addresses to RPC program number mapper

## SYNOPSIS
     **rpcbind** [**-adhiLlsr**]

## 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 in‐
     voked.

     When **rpcbind** is started, it checks that certain name-to-address translation-calls function cor‐
     rectly.  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 -d

### -d
             tion, 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

### -h
             fied multiple times and can be used to restrict the interfaces rpcbind will respond to.
             When specifying IP addresses with **-h**, **rpcbind** will automatically add 127.0.0.1 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
             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

### -s
             use non-privileged ports for outgoing connections, preventing non-privileged clients
             from using **rpcbind** to connect to services from a privileged port.

### -w
             state file is created when **rpcbind** terminates.

### -r
             rpcinfo need this feature turned on for work properly. (This flag is a Debian exten‐
             sion.)

## FILES
     If "/etc/default/rpcbind" exists, rpcbind will use the specified options at launch time **rpcbind**
     Otherwise rpcbind will try to load configuration from "/etc/rppcbind.conf" **rpcbind** The default
     options are set as "-w -f".

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

## SEE ALSO
     [rpcinfo(8)](https://www.chedong.com/phpMan.php/man/rpcinfo/8/markdown)

## LINUX PORT
     Aurelien Charbon <<aurelien.charbon@bull.net>>

BSD                           September 14, 1992                           BSD