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RPCBIND(8) | System Manager's Manual | RPCBIND(8) |
NAME¶
rpcbind
—
SYNOPSIS¶
rpcbind |
[-adhiLls ] |
DESCRIPTION¶
Therpcbind
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 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 is typically necessary when running on a
multi-homed host. If no
-h
option is specified,rpcbind
will bind toINADDR_ANY
, which could lead to problems on a multi-homed host due torpcbind
returning a UDP packet from a different IP address than it was sent to. Note that when specifying IP addresses with-h
,rpcbind
will automatically add127.0.0.1
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 causesrpcbind
to use non-privileged ports for outgoing connections, preventing non-privileged clients from usingrpcbind
to connect to services from a privileged port. -w
- Cause
rpcbind
to do a "warm start" by read a state file whenrpcbind
starts up. The state file is created whenrpcbind
terminates.
NOTES¶
All RPC servers must be restarted ifrpcbind
is
restarted.
SEE ALSO¶
rpcinfo(7)LINUX PORT¶
Aurelien Charbon <aurelien.charbon@bull.net>September 14, 1992 | Linux 4.9.0-9-amd64 |