It can also happen if "IP Routing" is enabled.
C:\> ipconfig -all
Windows IP Configuration
Host Name . . . . . . . . . . . . : censored
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Unknown
IP Routing Enabled. . . . . . . . : No <<<<------ (look here)
-----<<<<<<
WINS Proxy Enabled. . . . . . . . : Yes
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek RTL8169/8110 Family Gigabit
Ethernet NIC
Physical Address. . . . . . . . . : 08-54-3F-00-F0-EF
Dhcp Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 192.168.0.20
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . : 192.168.1.1
DNS Servers . . . . . . . . . . . : 68.238.128.14
68.238.64.14
C:\>
--
"Fish" (David B. Trout)
[email protected]
From: [email protected]
[mailto:[email protected]] On Behalf Of Gianluca Varenni
Sent: Thursday, May 13, 2010 8:46 AM
To: [email protected]
Cc: winpcap-users
Subject: Re: [Winpcap-users] Injected packets are duplicated on vmware
Importance: High
Packet duplication is usually caused by the virtual NIC drivers of vmware
(or in any case their networking virtualization layer). I've seen this kind
of problems with vmware workstation, but I've never used vCenter (which I
believe is just a management tool for a cloud of VMs using VMware server or
something similar).
Have a nice day
GV
From: rouli <mailto:[email protected]>
Sent: Thursday, May 13, 2010 8:31 AM
To: Gianluca Varenni <mailto:[email protected]>
Cc: winpcap-users <mailto:[email protected]>
Subject: Re: [Winpcap-users] Injected packets are duplicated on vmware
vCenter 4.0.0
After some digging, I don't believe the problem is with the VMWare, but
rather with vista.
I have installed the same vista image on a physical machine, and still see
packet duplication.
Since it's only got Service Pack 1 installed, I'm now installing Service
Pack 2 and will check whether the problem persists.
On Thu, May 13, 2010 at 5:59 PM, Gianluca Varenni
<[email protected]> wrote:
Which version of vmware are you using?
Have a nice day
GV
From: rouli <mailto:[email protected]>
Sent: Thursday, May 13, 2010 6:04 AM
To: winpcap-users <mailto:[email protected]>
Subject: [Winpcap-users] Injected packets are duplicated on vmware
I'm trying to figure out a setup issue and would appreciate any help.
I have a vista virtual machine and a program that injects packet to the
network using winpcap.
Every injected packet is duplicated, where the second packet is the exact
copy of the original packet but only the IP's checksum and TTL are changed
(TTL decreased by one).
For example, if I inject an ICMP echo request using winpcap, the target
machine actually gets two requests.
The duplication happens on the vista machine - I've validated this by using
wireshark.
Any ideas of what can cause such an issue?
Thanks
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