187 lines
3.3 KiB
HTML
187 lines
3.3 KiB
HTML
<HTML
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><HEAD
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><TITLE
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>The RPC Portmapper
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</TITLE
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><META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK
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REL="HOME"
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TITLE="The Linux NIS(YP)/NYS/NIS+ HOWTO"
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TITLE="How it works"
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TITLE="What do you need to set up NIS?
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"
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>The Linux NIS(YP)/NYS/NIS+ HOWTO</TH
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><H1
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><A
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NAME="PORTMAPPER"
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></A
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>5. The RPC Portmapper
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</H1
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><P
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>To run any of the software mentioned below you will need to run the
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program /sbin/portmap. Some Linux distributions already have
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the code in the /sbin/init.d/ or /etc/rc.d/ files to start up this
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daemon. All you have to do is to activate it and reboot your Linux
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machine. Read your Linux Distribution Documentation how to do this.</P
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><P
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>The RPC portmapper (portmap(8)) is a server that converts RPC program
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numbers into TCP/IP (or UDP/IP) protocol port numbers. It must be
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running in order to make RPC calls (which is what the NIS/NIS+ client
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software does) to RPC servers (like a NIS or NIS+ server) on that machine.
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When an RPC server is started, it will tell portmap what port number it
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is listening to, and what RPC program numbers it is prepared to serve.
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When a client wishes to make an RPC call to a given program number, it
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will first contact portmap on the server machine to determine the port
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number where RPC packets should be sent.</P
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><P
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>Since RPC servers could be started by inetd(8), portmap should
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be running before inetd is started.</P
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><P
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>For secure RPC, the portmapper needs the Time service. Make sure, that the
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Time service is enabled in /etc/inetd.conf on all hosts:
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<TABLE
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BORDER="1"
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BGCOLOR="#E0E0E0"
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WIDTH="100%"
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><TR
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><TD
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><FONT
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COLOR="#000000"
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><PRE
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CLASS="SCREEN"
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>#
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# Time service is used for clock syncronization.
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#
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time stream tcp nowait root internal
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time dgram udp wait root internal</PRE
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></FONT
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></TD
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></TR
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></TABLE
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> </P
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><P
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>IMPORTANT: Don't forget to restart inetd after changes on its
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configuration file !</P
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>Prev</A
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>How it works</TD
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><TD
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> </TD
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><TD
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VALIGN="top"
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>What do you need to set up NIS? </TD
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></TR
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> |