Re: (ASCEND) ISDN Up all the time??!!

[<mel@becknet.com>]

>Has anyone dealt with this errant ISDN use, and if so what did they do to
>stop it. I am thinking of making a filter that blocks all packets, except
>for ... This exclude list would include DNS, SMTP, some of our own
>proprietary protocols, and maybe HTTP. All other data would be blocked. Is
>this the only way to go??  Does anyone have such a filter they could share
>with me as an example??
>
>The environment in each office is similar
>
>	PC's running NT WS, version 3.51 or 4.0. They are using a remote PDC, 
>located
>	at the central site. They are using NetBios over TCP/IP.
>
>	Unix systems, mostly Sun's. They get their mail and DNS/NIS locally on 
>	a server in that office. 
>

Michael,

  Running NetBios over TCP/IP is likely the problem. NetBIOS is very 
chatty, and Ascend's standard IP call filter won't block it. If you just 
block NetBios specifically, that probably will fix the problem. Trying to 
block everything and then only permit certain protocols will be 
impractical due to the small size of the Pipeline's filter list.

 -mel beckman



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