I posted this question to the KVM list, but I thought I’d try here too–sorry if this is the wrong place to post this, can you please direct me to the correct forum or list if so, thanks!
I’m working on a network security project, using KVM installed on CentOS 6.7 through yum. I have a VM with the goal of using this as a network appliance, and two other VMs, one simulating an attack node and the other simulating a vulnerable webapp. These are all connected to the same internal private network set up in KVM. The idea with the network appliance VM is to have it act as if it’s connected to a network tap so it can see the traffic between the other two VMs. I’m not able to see the traffic currently and would appreciate your help or suggestions to see if this is possible and how I can set this up if so. I came across some information online suggesting to have the interfaces in promiscuous mode, including the virtual NIC for the private network, and I’ve tried all combinations. Thanks for any help you can offer!