portmap



PORTMAP(8)                BSD System Manager’s Manual               PORTMAP(8)


NAME

     portmap - DARPA port to RPC program number mapper


SYNOPSIS

     portmap [-d] [-l] [-v]


DESCRIPTION

     Portmap is a server that converts RPC program numbers into DARPA protocol
     port numbers.  It must be running in order to make RPC calls.

     When an RPC server is started, it will tell portmap what port number it
     is listening to, and what RPC program numbers it is prepared to serve.
     When a client wishes to make an RPC call to a given program number, it
     will first contact portmap on the server machine to determine the port
     number where RPC packets should be sent.

     Portmap must be started before any RPC servers are invoked.

     Normally portmap forks and dissociates itself from the terminal like any
     other daemon.  Portmap then logs errors using syslog(3).

     Option available:

     -d      (debug) prevents portmap from running as a daemon, and causes
             errors and debugging information to be printed to the standard
             error output.

     -l      (localhost only) causes portmap to only bind to the loopback
             interface (i.e. INADDR_LOOPBACK).

     -v      (verbose) run portmap in verbose mode.

     This portmap version is protected by the tcp_wrapper library. You have to
     give the clients access to portmap if they should be allowed to use it.
     To allow connects from clients of the .bar.com domain you could use the
     following line in /etc/hosts.allow:

     portmap: .bar.com

     You have to use the daemon name portmap for the daemon name (even if the
     binary has a different name). For the client names you can use the key-
     word ALL, IP addresses, hostnames or domain names.

     For further information please have a look at the tcpd((8)),
     hosts_allow((5)) and hosts_access((5)) manual pages.


SEE ALSO

     xinetd.conf((5)), rpcinfo((8)), pmap_set((8)), pmap_dump((8)),
     xinetd((8)) tcpd((8)) hosts_access((5)) hosts_options((5))


BUGS

     If portmap crashes, all rpc servers must be restarted.


HISTORY

     The portmap command appeared in BSDBSD 4.3.

4.3 Berkeley Distribution       March 16, 1991       4.3 Berkeley Distribution

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