NAME
rpcbind —
universal addresses to RPC
program number mapper
SYNOPSIS
DESCRIPTION
rpcbind 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.
rpcbind 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.
rpcbind 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.
OPTIONS
-
-
- -d
- Run in debug mode. In this mode, rpcbind
will not fork when it starts, will print additional information during
operation, and will abort on certain errors. With this option, the
name-to-address translation consistency checks are shown in detail.
-
-
- -i
- “insecure” mode. Allows 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
- Turns on libwrap connection logging.
-
-
- -s
- Causes 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.
-
-
- -L
- Allow old-style local connections over the loopback
interface. Without this flag, local connections are only allowed over a
local socket, /var/run/rpcbind.sock
NOTES
All RPC servers must be restarted if
rpcbind is restarted.
FILES
- /var/run/rpcbind.sock
-
- /etc/hosts.allow
- explicit remote host access list.
- /etc/hosts.deny
- explicit remote host denial of service list.
SEE ALSO
rpcbind(3),
hosts_access(5),
hosts_options(5),
netconfig(5),
rpcinfo(8)