Re: dhcpd.conf authoritative
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On 03/05/2006 06:11 PM, Carlos Alberto wrote:
> Olá,
> O que significa a linha "authoritative;" que vejo em alguns exemplos de
> arquivos de configurações do dhcpd.conf, alguem sabe?
Do mundialmente conhecido "man dhcpd.conf":
The authoritative statement
authoritative;
not authoritative;
The DHCP server will normally assume that the configuration informa-
tion about a given network segment is not known to be correct and is
not authoritative. This is so that if a naive user installs a DHCP
server not fully understanding how to configure it, it does not send
spurious DHCPNAK messages to clients that have obtained addresses
from a legitimate DHCP server on the network.
Network administrators setting up authoritative DHCP servers for
their networks should always write authoritative; at the top of
their configuration file to indicate that the DHCP server should
send DHCPNAK messages to misconfigured clients. If this is not
done, clients will be unable to get a correct IP address after
changing subnets until their old lease has expired, which could take
quite a long time.
Usually, writing authoritative; at the top level of the file should
be sufficient. However, if a DHCP server is to be set up so that
it is aware of some networks for which it is authoritative and some
networks for which it is not, it may be more appropriate to declare
authority on a per-network-segment basis.
Note that the most specific scope for which the concept of authority
makes any sense is the physical network segment - either a shared-
network statement or a subnet statement that is not contained within
a shared-network statement. It is not meaningful to specify that
the server is authoritative for some subnets within a shared net-
work, but not authoritative for others, nor is it meaningful to
specify that the server is authoritative for some host declarations
and not others.
É uma forma de configurar seu servidor DHCP para que ele evite
problemas com a "aparição" de outros serviços DHCP mal configurados na
mesma rede.
Abraço,
- --
Felipe Augusto van de Wiel (faw)
"Debian. Freedom to code. Code to freedom!"
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