[GTER] Resolução de nomes DNS x WINS.

Marcus Grando marcus em big.univali.br
Quarta Fevereiro 12 14:32:00 BRST 2003


Ola Marlon,

Isso é configuração do NBT do Windows, dá para configurar para ele não
tentar mais resolver via DNS. Não sei se é default acho que nem a
Microsoft sabe o que é default pois cada versão do windows sai de um
jeito.

Para Windows NT/2000/XP:
HKLM\SYSTEM\CurrentControlSet\Services\NetBT\Parameters
Valores como inteiros

Para Win95/98/ME
HKLM\System\CurrentControlSet\Services\VxD\MSTCP
Valores como String

-----
NodeType

Key: Netbt\Parameters
Value Type: REG_DWORD - Number
Valid Range: 1,2,4,8 (B-node, P-node, M-node, H-node)
Default: 1 or 8 based on the WINS server configuration
Description: This parameter determines what methods NetBT will use to
register and resolve names. A B-node system uses broadcasts. A P-node
system uses only point- to-point name queries to a name server (WINS). An
M-node system broadcasts first, then queries the name server. An H-node
system queries the name server first, then broadcasts. Resolution via
LMHOSTS and/or DNS, if enabled, will follow the these methods. If this key
is present it will override the DhcpNodeType key. If neither key is
present, the system defaults to Bnode if there are no WINS servers
configured for the network. The system defaults to Hnode if there is at
least one WINS server configured.

EnableDns

Key: Netbt\Parameters
Value Type: REG_DWORD - Boolean
Valid Range: 0 or 1 (False or True)
Default: 0 (False)
Description: If this value is set to 1 (True), then NBT will query the DNS
for names that cannot be resolved by WINS, broadcast, or the LMHOSTS file.

EnableLmhosts

Key: Netbt\Parameters
Value Type: REG_DWORD - Boolean
Valid Range: 0 or 1 (False or True)
Default: 1 (True)
Description: If this value is set to 1 (True), then NBT will search the
LMHOSTS file, if it exists, for names that cannot be resolved by WINS or
broadcast. By default there is no Lmhosts file database directory
(specified by Tcpip\Parameters\DatabasePath), so no action will be taken.
This value is written by the Advanced TCP/IP configuration dialog of the
Network tool in Control Panel.

EnableProxy

Key: Netbt\Parameters
Value Type: REG_DWORD - Boolean
Valid Range: 0 or 1 (False or True)
Default: 0 (False)
Description: If this value is set to 1 (True), then the system will act as
a proxy name server for the networks that NBT is bound to. A proxy name
server answers broadcast queries for names that it has resolved through
WINS. A proxy nameserver allows a network of Bnode implementations to
connect to servers on other subnets that are registered with WINS.
-----

Abraços

-- Marcus Grando
Tecnologia da Informação
<marcus at sbh dot eng dot br>
<marcus at big dot univali dot br>

On Wed, 12 Feb 2003, MARLON BORBA wrote:

> Colegas do GT/ER,
>
> Observando, por meio de um monitor de rede em nível de aplicação (o Appdancer/FA da Appdancer Networks, www.appdancer.com), a rede interna da empresa, observei que nosso servidor DNS interno (Bind) recebe inúmeras queries com "hostnames" típicos de máquinas WINS, contendo inclusive underscores (_), caracteres vedados pela especificação DNS oficial.
>
> Sabem de alguma forma de impedir essas queries WINS de "entuxarem" meu DNS? O default do WINS, quando não acha um "hostname", é um "fallback" para DNS?
>
> []s,
>
> Marlon.
>
> /*
> Marlon Borba
> Divisao de Suporte Tecnico
> TRF 3a. Regiao
> (11) 3311-4683 e 9692-8357
> mborba em trf3.gov.br - marlonborba em acm.org
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