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Minix/2.0.0/wwwman/man8/rarpd.8.html
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Minix/2.0.0/wwwman/man8/rarpd.8.html
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<HTML>
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<HEAD>
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<TITLE>rarpd(8)</TITLE>
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</HEAD>
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<BODY>
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<H1>rarpd(8)</H1>
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<HR>
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<PRE>
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</PRE>
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<H2>NAME</H2><PRE>
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rarpd - reverse address resolution protocol daemon
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</PRE>
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<H2>SYNOPSIS</H2><PRE>
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<STRONG>rarpd</STRONG> [<STRONG>-d</STRONG>]
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</PRE>
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<H2>DESCRIPTION</H2><PRE>
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<STRONG>Rarpd</STRONG> listens on the ethernet for broadcast packets asking for reverse
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address resolution. These packets are sent by hosts at boot time to find
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out their IP address. <STRONG>Rarpd</STRONG> looks up the six octet ethernet number in
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the <STRONG>/etc/ethers</STRONG> file finding a host name. This name is translated to the
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IP address of the host by a DNS lookup. The IP address is then sent to
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the host.
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Before <STRONG>rarpd</STRONG> can start its service it first finds out what the IP
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addresses of the ethernets are. It will look through <STRONG>/etc/ethers</STRONG> to map
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the ethernet addresses to host names. It then uses <STRONG>/etc/hosts</STRONG> to map the
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host names to IP addresses. If this lookup fails then several RARP
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requests are broadcasted in the hope that some RARP server knows the
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addresses. The IP addresses are eventually set in the same way as
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<STRONG><A HREF="../man8/ifconfig.8.html">ifconfig(8)</A></STRONG>. (The address is not changed if already set with <STRONG>ifconfig</STRONG>.)
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Note that the host names in the ethers and hosts files must match
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exactly. The DNS can not be used yet, so a simple name can't be
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translated to a fully qualified name.
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<STRONG>Rarpd</STRONG> exits after startup if there are no active ethernets, or if there
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is no ethers file.
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<STRONG>Warning!</STRONG> Sun diskless workstations assume that the first RARP server that
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answers is the host they are to boot from. For this to work all other
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Sun RARP servers delay their answer if they are not also the requestors
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boot server. The Minix <STRONG>rarpd</STRONG> does not have this kludge so it will
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happily engage the Sun boot server to see who can answer the client
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first. Unless your Minix host can actually serve a Sun diskless client,
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it is better not to list any more hosts in the ethers file than
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necessary.
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</PRE>
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<H2>OPTIONS</H2><PRE>
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<STRONG>-d</STRONG> Turns on debugging messages. Debugging can also be turned on at
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runtime by sending signal <STRONG>SIGUSR1</STRONG> or turned off with <STRONG>SIGUSR2</STRONG>.
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</PRE>
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<H2>SEE ALSO</H2><PRE>
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<STRONG><A HREF="../man8/ifconfig.8.html">ifconfig(8)</A></STRONG>, <STRONG><A HREF="../man5/ethers.5.html">ethers(5)</A></STRONG>, <STRONG><A HREF="../man5/hosts.5.html">hosts(5)</A></STRONG>, <STRONG><A HREF="../man8/set_net_default.8.html">set_net_default(8)</A></STRONG>, <STRONG><A HREF="../man8/boot.8.html">boot(8)</A></STRONG>, <STRONG><A HREF="../man8/inetd.8.html">inetd(8)</A></STRONG>,
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<STRONG><A HREF="../man8/irdpd.8.html">irdpd(8)</A></STRONG>, <STRONG><A HREF="../man8/nonamed.8.html">nonamed(8)</A></STRONG>.
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</PRE>
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<H2>AUTHOR</H2><PRE>
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Kees J. Bot (kjb@cs.vu.nl)
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</PRE>
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</BODY>
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</HTML>
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