@Ctek thank for the howto, well detailed…nice
I missed the point why you take the way to install NS on two NIC with an internal network and a bridged network. This is needed when you want to test a gateway configuration and you learned me that the internal network can be pinged from the real computer (I didn’t know before, I used another VM for that), but if you want to be simple you could take the choice to install NS only on one bridged NIC and use it to be a real host on your network (give an IP in your range, the gateway of your network…)