Re: IP Flooding

Discussion in 'Computer Security' started by Hamish, Aug 19, 2003.

  1. Hamish

    Hamish Guest

    I have isolated all workstations and the problem persists. Could be the NIC
    in the server though??
    "5150" <> wrote in message
    news:...
    > On Tue, 19 Aug 2003 13:20:23 GMT, "Hamish" <>
    > wrote:
    >
    > >I have a Win2K server that is demonstrating signs of IP spoofing and

    Denial
    > >of Service. The server connects to the internet via a DUN connection

    shared
    > >using ICS. In the last two days the network has slowed to nothing and
    > >several network apps including mail and web access have failed while

    trying
    > >to access resources on the server or on the external network.
    > >
    > > I have noticed that while the DUN connection is active the modem and DUN
    > >properties indicates a constant stream of data being uploaded from the
    > >server. The network functions normally when the DUN connection is

    disabled.
    > >
    > >The problem is not ISP specific as I have tried alternates. There is no
    > >firewall present (please no lectures, its not my network).
    > >
    > > Can anyone help me to isolate the cause of this problem?
    > >

    >
    >
    > How many machines do you have? If not too many, you might want to
    > take the poor mans approach and just start unplugging them one by one
    > to see if your problem goes away. I have experienced problems like
    > this when I had a bad NIC card in a machine. If you have a lot of
    > machines you should get yourself a packet sniffer / network analyzer.
    >
     
    Hamish, Aug 19, 2003
    #1
    1. Advertising

Want to reply to this thread or ask your own question?

It takes just 2 minutes to sign up (and it's free!). Just click the sign up button to choose a username and then you can ask your own questions on the forum.
Similar Threads
  1. Matt

    Router Flooding Interface

    Matt, Jul 10, 2003, in forum: Cisco
    Replies:
    2
    Views:
    2,324
    Michael T. Hall
    Jul 11, 2003
  2. Peter Boutzev

    Catalyst 3524 unicast flooding

    Peter Boutzev, Feb 21, 2004, in forum: Cisco
    Replies:
    1
    Views:
    3,169
    Peter Boutzev
    Feb 23, 2004
  3. David Reinhart

    wlbs and catalyst 3750 port flooding

    David Reinhart, Feb 23, 2004, in forum: Cisco
    Replies:
    1
    Views:
    1,552
    Peter Boutzev
    Feb 23, 2004
  4. Graham Broadbridge

    C2950 and Multicast flooding

    Graham Broadbridge, Feb 24, 2004, in forum: Cisco
    Replies:
    9
    Views:
    4,933
    Michael Janke
    Feb 26, 2004
  5. RJ45
    Replies:
    1
    Views:
    1,539
    Hansang Bae
    Jul 30, 2004
Loading...

Share This Page