----- Original Message ----- 
  From: Coleman Brumley 
  To: 'Gianluca Varenni' ; [email protected] 
  Sent: Wednesday, November 04, 2009 7:47 AM
  Subject: RE: [Winpcap-users] Multiple NICs


  Even if Wireshark is running on the same PC with the two applications, it 
won't see the traffic then?



That doesn't matter. 

   

  Is the traffic not ever reaching the NDIS level on the PC?



Yes, the traffic is completely managed by the TCP/IP stack driver, which sits 
at the top of the NDIS stack.



GV

   

  From: Gianluca Varenni [mailto:[email protected]] 
  Sent: Wednesday, November 04, 2009 10:44 AM
  To: [email protected]; [email protected]
  Subject: Re: [Winpcap-users] Multiple NICs

   

  If the two applications run on the same PC, even if bound to two different IP 
addresses assigned to two different NICs, the traffic will not hit the wire at 
all. The traffic between the two applications is routed directly by the TCP/IP 
stack, and will not reach the NIC card.

   

  Hope this helps

  GV

   

    ----- Original Message ----- 

    From: Coleman Brumley 

    To: [email protected] 

    Sent: Wednesday, November 04, 2009 7:06 AM

    Subject: [Winpcap-users] Multiple NICs

     

    Hello.

     

    I have a scenario where I have multiple NICs installed in my PC.  I have 2 
applications running, each bound to a separate NIC/IP Address and sending UDP 
traffic between the two applications.

     

    When attempting to capture this traffic, though, Wireshark is only 
capturing broadcasts.  Is there some issue when capturing this type of traffic 
on the same PC?  

     

    Best Regards,

    Coleman

     

     


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