ea9ed3d85b
new command line options -W, to enable it when needed. On my tests this change by almost ten times improves rpcbind performance. No objections: many, net@
151 lines
3.3 KiB
Groff
151 lines
3.3 KiB
Groff
.\" @(#)rpcbind.1m 1.19 92/09/14 SMI; from SVr4
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.\" Copyright 1989 AT&T
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.\" Copyright 1991 Sun Microsystems, Inc.
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.\" $FreeBSD$
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.Dd March 6, 2014
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.Dt RPCBIND 8
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.Os
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.Sh NAME
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.Nm rpcbind
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.Nd universal addresses to RPC program number mapper
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.Sh SYNOPSIS
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.Nm
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.Op Fl 6adiLls
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.Op Fl h Ar bindip
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.Sh DESCRIPTION
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The
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.Nm
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utility is a server that converts
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.Tn RPC
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program numbers into
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universal addresses.
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It must be running on the host to be able to make
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.Tn RPC
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calls
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on a server on that machine.
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.Pp
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When an
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.Tn RPC
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service is started,
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it tells
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.Nm
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the address at which it is listening,
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and the
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.Tn RPC
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program numbers it is prepared to serve.
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When a client wishes to make an
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.Tn RPC
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call to a given program number,
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it first contacts
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.Nm
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on the server machine to determine
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the address where
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.Tn RPC
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requests should be sent.
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.Pp
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The
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.Nm
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utility should be started before any other RPC service.
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Normally, standard
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.Tn RPC
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servers are started by port monitors, so
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.Nm
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must be started before port monitors are invoked.
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.Pp
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When
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.Nm
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is started, it checks that certain name-to-address
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translation-calls function correctly.
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If they fail, the network configuration databases may be corrupt.
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Since
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.Tn RPC
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services cannot function correctly in this situation,
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.Nm
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reports the condition and terminates.
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.Pp
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The
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.Nm
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utility can only be started by the super-user.
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.Sh OPTIONS
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.Bl -tag -width indent
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.It Fl 6
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Bind to AF_INET6 (IPv6) addresses only.
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.It Fl a
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When debugging
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.Pq Fl d ,
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do an abort on errors.
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.It Fl d
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Run in debug mode.
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In this mode,
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.Nm
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will not fork when it starts, will print additional information
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during operation, and will abort on certain errors if
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.Fl a
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is also specified.
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With this option, the name-to-address translation consistency
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checks are shown in detail.
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.It Fl h Ar bindip
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Specify specific IP addresses to bind to for TCP and UDP requests.
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This option
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may be specified multiple times and is typically necessary when running
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on a multi-homed host.
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If no
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.Fl h
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option is specified,
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.Nm
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will bind to
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.Dv INADDR_ANY ,
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which could lead to problems on a multi-homed host due to
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.Nm
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returning a UDP packet from a different IP address than it was
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sent to.
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Note that when specifying IP addresses with
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.Fl h ,
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.Nm
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will automatically add
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.Li 127.0.0.1
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and if IPv6 is enabled,
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.Li ::1
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to the list.
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.It Fl i
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.Dq Insecure
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mode.
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Allow calls to SET and UNSET from any host.
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Normally
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.Nm
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accepts these requests only from the loopback interface for security reasons.
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This change is necessary for programs that were compiled with earlier
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versions of the rpc library and do not make those requests using the
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loopback interface.
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.It Fl L
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Allow old-style local connections over the loopback interface.
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Without this flag, local connections are only allowed over a local socket,
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.Pa /var/run/rpcbind.sock .
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.It Fl l
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Turn on libwrap connection logging.
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.It Fl s
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Cause
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.Nm
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to change to the user daemon as soon as possible.
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This causes
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.Nm
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to use non-privileged ports for outgoing connections, preventing non-privileged
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clients from using
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.Nm
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to connect to services from a privileged port.
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.It Fl W
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Enable libwrap (TCP wrappers) support.
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.El
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.Sh NOTES
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All RPC servers must be restarted if
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.Nm
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is restarted.
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.Sh FILES
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.Bl -tag -width /var/run/rpcbind.sock -compact
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.It Pa /var/run/rpcbind.sock
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.El
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.Sh SEE ALSO
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.Xr rpcbind 3 ,
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.Xr netconfig 5 ,
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.Xr rpcinfo 8
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