RE: Spoof Attack

  • From: "Thomas W Shinder" <tshinder@xxxxxxxxxxxxxxxxxx>
  • To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
  • Date: Thu, 5 Jun 2003 06:37:14 -0500

Hey guys,
 
Are you being spoofed? Or are your LAT entries incorrect or are you
putting two interfaces on the same segment? Its strange to see a spoof
from a public address since it should be reachable from the external
interface.
 
Thanks!
Tom
 
Thomas W Shinder
www.isaserver.org/shinder <http://www.isaserver.org/shinder>  
ISA Server and Beyond: http://tinyurl.com/1jq1
Configuring ISA Server: http://tinyurl.com/1llp
<http://tinyurl.com/1llp> 

 

        -----Original Message-----
        From: Rami SIK [mailto:rami@xxxxxxxxxxxxxxx] 
        Sent: Thursday, June 05, 2003 3:46 AM
        To: [ISAserver.org Discussion List]
        Subject: [isalist] RE: Spoof Attack
        
        
        http://www.ISAserver.org
        
        

        I am also getting such messages recently. This morning, there
were more than 500 email alerts complaining spoof attack.

         

        Any idea?

         

         

        
--------------------------------------------------------------------

        Rami SIK

         

        System & Network Administrator

        CCNA

         

        Kimyatas

        Istanbul / Turkey

         

        Tel:90-212-334 4963

        
--------------------------------------------------------------------

         

        -----Original Message-----
        From: Lim, Arthus T. [mailto:alim@xxxxxxxxx] 
        Sent: Thursday, June 05, 2003 11:34 AM
        To: [ISAserver.org Discussion List]
        Subject: [isalist] Spoof Attack

         

        http://www.ISAserver.org

         ISA Server detected a spoof attack from Internet Protocol (IP)
address 203.167.103.38. A spoof attack occurs when an IP address that is
not reachable via the interface on which the packet was received. If
logging for dropped packets is set, you can view details in the packet
filter log.

         

         

        I received a lot of this alert messages lately.  How can I avoid
spoof attack? 

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