[vbox-dev] VirtualBox blocks 127/8 (loopback) subnets for intnet

george.vargh at wipro.com george.vargh at wipro.com
Tue Dec 1 12:43:42 UTC 2015


Hi,

We are having our test topology running multiple VMs on a server.
The guest VMs are linux based and the host is based on RHEL 6.4.

The eth interface of VMs are interconnected via 'intnet' NIC settings.
The VMs are using 127/8 IP addresses to communicate with each other.

We are currently using VirtualBoX 3.1.8 and everything works fine.
But when we upgrade to latest VirtualBoX 5.0.10, we observe that the 127/8 IP addresses are being blocked and it does not reach the VM interfaces.

Based on our testing, it looks like this behaviour is seen from VirtualBox 3.2.0 onwards.
Can you please suggest if there is a way to get these IP address to be allowed?

Best Regards
George
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