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

Andy
Date: 01/31/05 

Date: Mon, 31 Jan 2005 18:44:15 -0000

"Phillip Windell" <@.> wrote in message
news:egh45d7BFHA.2788@TK2MSFTNGP15.phx.gbl...
>
> <Andy> wrote in message news:u5nRUQgBFHA.3096@TK2MSFTNGP14.phx.gbl...
> > Thanks for posting. What would you recommend we use to stop such traffic
> > being broadcast? Our network Switches are all 3Com 4200 series.
>
> As he said,..they aren't "broadcasted", they are "directed". Switches and
> Routers are irrelevant.
>
> > 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
>
> No. The solution is to solve the problem,..not block the problem. You need
> to check for an invalid network configuration on the Host causing the
> problem.
>
> --
>
> Phillip Windell [MCP, MVP, CCNA]
> www.wandtv.com
>
Phillip,

Thanks for posting a reply. This is the first time I have come across the
term "directed" in this context. Google returned the following

"A network in which each arc has an associated direction of flow.
Directionof flow can be determined by arc direction (e.g., each arc is
digitized so that it is oriented downstream), a value in an item in the AAT,
or through the use of a selection file."

>From this I am unable to work out in what way NBNS are directed.

My problem is that I am not the admin of the network from where this traffic
is originating. I have no control over their configuration and they rely on
my network solely for Internet access, Email and IIS. When problems have
occured they have fixed them only for the problem to re occur some time
later. Meanwhile I am getting some heat from a particular head of department
and looking silly.

Call me paranoid but I would like to have something in place that would
prevent my network being affected even if the same problem re - occurs on
the Music (other) network.

Any recommendations?

Andy.

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