please expliam me this lines.

meandsushil · 05-31-2010, 04:08 AM

this is "dhcpd.conf" files starting contents, please tell what does these lines means?

allow booting;
allow bootp;
ddns-update-style interim;

ignore client-updates;

option domain-name "example.com cracker.org";

linuxlover.chaitanya · 05-31-2010, 04:18 AM

http://www.daemon-systems.org/man/dhcpd.conf.5.html

druuna · 05-31-2010, 04:24 AM

Hi,

Quote:

The booting keyword

allow booting;
deny booting;
ignore booting;

The booting flag is used to tell dhcpd whether or not to respond to
queries from a particular client. This keyword only has meaning when
it appears in a host declaration. By default, booting is allowed, but
if it is disabled for a particular client, then that client will not be
able to get an address from the DHCP server.

Quote:

The bootp keyword

allow bootp;
deny bootp;
ignore bootp;

The bootp flag is used to tell dhcpd whether or not to respond to bootp
queries. Bootp queries are allowed by default.

This option does not satisfy the requirement of failover peers for
denying dynamic bootp clients. The deny dynamic bootp clients; option
should be used instead. See the ALLOW AND DENY WITHIN POOL DECLARATIONS
section of this man page for more details.

Quote:

The ddns-update-style parameter

ddns-update-style style;

The style parameter must be one of ad-hoc, interim or none. The
ddns-update-style statement is only meaningful in the outer scope -
it is evaluated once after reading the dhcpd.conf file, rather than
each time a client is assigned an IP address, so there is no way to
use different DNS update styles for different clients.

Quote:

The client-updates keyword

allow client-updates;
deny client-updates;

The client-updates flag tells the DHCP server whether or not to honor
the client's intention to do its own update of its A record. This is
only relevant when doing interim DNS updates. See the documentation
under the heading THE INTERIM DNS UPDATE SCHEME for details.

All this and more can be found in the dhcpd.conf man page.