Re: NBNS (Netbios) storm, how to prevent?

Andy
Date: 01/29/05 

Date: Sat, 29 Jan 2005 13:12:22 -0000

"Doug Sherman [MVP]" <dsherman@nospam.tampabay.rr.com> wrote in message
news:O$WsuGNBFHA.208@TK2MSFTNGP12.phx.gbl...
> Make sure the problem client is not configured to use a nonexistent or
> erroneous WINS server.
>
> If the query is for a name that exists on the network, create an lmhosts
> file on the problem client which maps the correct IP address to the name.
> If the name does not exist, map the name to 127.0.0.1.
>
> NBNS queries are directed packets, so they would be forwarded by a
> multihomed NT4.0 machine with IP forwarding enabled.
>
> Doug Sherman
> MCSE Win2k/NT4.0, MCSA, MCP+I, MVP
>

Doug,

Thanks for posting. What would you recommend we use to stop such traffic
being broadcast? Our network Switches are all 3Com 4200 series.

We know we can deal with this traffic once it has occured but the situation
is such that it would be better if we could implement a solution
that would isolate the two networks save for Internet access (port 80) and
Email (Outlook 2003). Our switches do have vlan support but we don't have
experience of this and I we don't have the time to spend discovering that
isn't the way forward for us. My thoughts are now leaning towards a
firewall. Any comments.

Thanks,

Andy.

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