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

Are they routing or bridging?




From: Michael Hyman <mhyman@quickturn.com> AT Internet on 01/30/98
      10:32 AM EST

To:   ascend-users@bungi.com AT Internet@ccMTA-USCU-NT-MTA
cc:   Michael Hyman <michael.hyman@quickturn.com> AT
      Internet@ccMTA-USCU-NT-MTA (bcc: Michael
      Medwid/Cupertino/Cal/SYMANTEC)
Subject:  (ASCEND) ISDN Up all the time??!!



Hello,

I am having a problem that Ascend tech support (with contract :) )
could not help with.

We have several P75's in the field and some of them are keeping the
line up all the time, resulting in outrageous charges, like $50,000 in
one month.

I am using the standard IP call filter, but nothing else.

What concerns me is that the router is doing exactly what it should be
doing, routing data. In other words, I know that if it sees data, it
will either keep a session active, or initiate a session.

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.

I know I am not providing a lot of detail, the problem is that we do
not have much. Just BIG bills. With the exception of people running
endless pings, which does happen some times, the users swear they are
doing nothing that would keep the lines active.

Any help would be greatly appreciated!!!!!

Thanks in advance...Michael


/---------------------------------------------------------------------
---\
| Michael Hyman                              Quickturn Design Systems
    |
| Manager, Information Technology Group      55 West Trimble Road
        |
| mhyman@quickturn.com                       San Jose, Ca. 95131
         |
| (408) 914-6409 Voice                       (408) 914-6909 Fax
          |
|

  |
| "Out the 10Base-T, through the router, off the bridge, over the
leased |
|       line, past the firewall, down the T1...nothing but Net."
         |
\---------------------------------------------------------------------
---/
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Date: Fri, 30 Jan 1998 10:32:14 -0800
To: ascend-users@bungi.com
From: Michael Hyman <mhyman@quickturn.com>
Subject: (ASCEND) ISDN Up all the time??!!
Cc: Michael Hyman <michael.hyman@quickturn.com>
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