"Liwanag, Manolito" wrote:
>
> I have several subnet on a single domain separated by several routers. I
> use IP helper-address for the remote sites to get to the DHCP server. I
> noticed that in my event viewer on my PDC I am getting a RDR error 8003. An
> election is being held for the Master Browser.
>
> I checked tech-net and I found that the problem is which port 137 and port
> 138 Netbios Nameserver and Datagram server. My question is ... how do I
> disable these 2 ports ?
The 'ip helper address' enables forwarding of several broadcast types,
mostly UDP, such as BOOTP, DHCP, TFTP, DNS, and you guessed it,
NetBIOS. Use the 'no ip forward-protocol udp 137', etc., to disable
forwarding of any unwanted types.
Many people quite mistakenly believe that 'ip helper-address' is just
for BOOTP/DHCP. They are mistaken :-) Personally, I would prefer a
new 'ip dhcp-forward a.b.c.d' type command to the older, overloaded
helper-address.
Jeff Kell <[EMAIL PROTECTED]>
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