URGENTE AYUDA!!! Nadie puede usar internet solo el server

Hola
Tengo un Win2003 con RRA configurado ssin ningun Firewall adicional ssolo
con el firewall basico de windows ( es una pequeña red de prueba )

Resulta que el server tiene 2 tarjetas de red, una de ellas se conecta al
dispositivo del ADSL y la otra a la red local

Por alguna razon que no entiendo solo el server tiene internet, todos los
demas no!!!!

Esta mañana instale una terminal con win2000 pro y sin mayormente hacer
nada en la terminal estaba saliendo a internet incluso corrí el
WindowsUpdate ( cambio de IE5 al 6)
Ahora en la tarde ya no!!!

QUE PUEDO REVISAR?????

cuando hago ping al DNS del proveedor de internet desde el server tengo
respuesta, pero cuando hago desde cualquier cliente no tengo respuesta!!!
ahora lo extraño es que los clientes si se logean al server que es el
controlador prncipal (server2003) y que es el que tiene la salida a
internet funcionando

En mi eventViwer aparece este error constantemente, por ahi tiene algo que
ver:

==> DNS server has updated its own host (A) records. In order to ensure that
its DS-integrated peer DNS servers are able to replicate with this server,
an attempt was made to update them with the new records through dynamic
update. An error was encountered during this update, the record data is
the error code.

If this DNS server does not have any DS-integrated peers, then this error
should be ignored.

If this DNS server's Active Directory replication partners do not have the
correct IP address(es) for this server, they will be unable to replicate
with it.

To ensure proper replication:
1) Find this server's Active Directory replication partners that run the
DNS server.
2) Open DnsManager and connect in turn to each of the replication
partners.
3) On each server, check the host (A record) registration for THIS server.
4) Delete any A records that do NOT correspond to IP addresses of this
server.
5) If there are no A records for this server, add at least one A record
corresponding to an address on this server, that the replication partner
can contact. (In other words, if there multiple IP addresses for this DNS
server, add at least one that is on the same network as the Active
Directory DNS server you are updating.)
6) Note, that is not necessary to update EVERY replication partner. It is
only necessary that the records are fixed up on enough replication
partners so that every server that replicates with this server will
receive (through replication) the new data.
>
GRACIAS!!!!