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I have 3 NIC's (internal network) on one Virtual box Machine(CentOS 6.4) each NIC has its own network name intnet1,intnet2 and intnet3. So how I understand this is eth0 is connected to internal network 1, eth1 is connected to internal network 2 and so on. When I start up another VM(CentOS 6.4) with only one NIC connected to intnet1 I can ping all 3 NIC's on the 'server' VM but if I now change the clients internal network to intnet2 the VM cannot find the 'server' VM. Have I misunderstood how the internal network of virtual box works? Thank you in advance.
Firewalls are turned off and I dont see how gateways are an issue since as I understand the internal network its a virtual direct link. Just to be clear I'm on a windows PC using to CentOs virtual machines. Can windows affect this virtual connection in anyway because as I understand the Vbox website the internal network does not even use your PC's real network adapter? – Francois du Plessis – 2014-11-16T08:59:57.273
Setting each NIC to have its own netmask seemed to have fixed the problem – Francois du Plessis – 2014-11-16T11:30:24.770