RPCBIND(8) | System Manager's Manual | RPCBIND(8) |
rpcbind
—
rpcbind |
[-6adiLlsWw ] [-h
bindip] |
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 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.
Access control is provided by
/etc/hosts.allow and
/etc/hosts.deny, as described in
hosts_access(5) with
daemon name rpcbind
.
-6
-a
-d
), abort on errors.-d
rpcbind
will not
fork when it starts, will print 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.-h
bindip-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
specifying IP addresses with -h
,
rpcbind
will automatically add
127.0.0.1
and if IPv6 is enabled,
::1
to the list.-i
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
-l
-s
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
-w
The warmstart feature saves RPC registrations on termination.
Any saved RPC registrations are restored on restart if
-w
is specified. This feature helps avoid RPC
service interruption when restarting rpcbind
.
warmstart support must be compiled in to
rpcbind
. Portmap registrations are stored in
/tmp/portmap.file.
rpcbind
registrations are stored in
/tmp/rpcbind.file.
rpcbind
is
restarted.
rpcbind
registrations file.August 17, 2017 | NetBSD 9.4 |