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dns-dhcp(1)		    General Commands Manual		   dns-dhcp(1)

NAME
       dns-dhcp	- generate dhcp	tables from DNS	tables

SYNOPSIS
       dns-dhcp	[ option...  ][	infile [ outfile ]]
       dns-dhcp	-Help
       dns-dhcp	-VERSion

DESCRIPTION
       The dns-dhcp program is used to generate	portions of the	/etc/dhcp.conf
       file from the forward DNS tables, augmented with	``ether	a'' entries.

       This  is	 supplemented with an additional ``dhcp'' class, so that extra
       information may be defined.

       The output format is described in the dhcpd (8) manual entry.  Usually,
       the output of the dns-dhcp command is included into the	/etc/dhcp.conf
       file,  rather  then  define the entire file with	the output in the dns-
       dhcp command.

DHCP TYPES
       The ``dhcp'' class has the following defined types:

       filename
	   The absolute	path of	the bootfile.

THE * DEFAULT
       The special host	name ``*'' may be used to specify defaults.  These may
       be over-riden by	specific entries.  The most recently  see  default  of
       each  type  name	is remembered.	This may be exploited, for example, to
       set different servers and gateways for different	networks.

OPTIONS
       The following options are understood:

       -Help
	       Provide some help with using the	dns-dhcp program.

       -VERSion
	       Print the version of the	dns-dhcp program being executed.

       All other options will produce a	diagnostic error.

EXAMPLE
       The idea	is that	you have all of	the information	concerning  each  com-
       puter  in  the one file.	 This makes it less likely that	something will
       be omitted, and simpler to change if the	name or	IP address changes.

       Given a database	file called ``example.com''  and  which	 contains  the
       following text
       You can generate	the /etc/dhcp.conf file	using the following command
	      %	dns-dhcp example.com /etc/dhcp.conf
	      %
       Here is what you	would see as the output
       Note that the output uses relative names.

   Makefile
       All of this can be automated using the following	makefile fragment:
	      /etc/dhcp.conf: example.com
		      dns-dhcp example.com $@
       By doing	this, all you need to do is edit the example.com file, and the
       use the make(1) command to bring	everything up-to-date.

       If  you were using NIS, NIS+ or LDAP you	would update them, rather than
       the static file.

Reference Manual		    dnsutl			   dns-dhcp(1)

Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=dns-dhcp&sektion=1&manpath=FreeBSD+Ports+15.0>

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