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Hi George,<br>
<br>
If you mean IPs like 127.x.x.x, they are dedicated to localhost
communications by the TCP/IP standard and described as such in <a
href="https://tools.ietf.org/html/rfc990">RFC 990</a>:<br>
<pre class="newpage">The class A network number 127 is assigned the "loopback"
function, that is, a datagram sent by a higher level protocol
to a network 127 address should loop back inside the host. No
datagram "sent" to a network 127 address should ever appear on
any network anywhere.</pre>
<br>
You are lucky it ever worked in the first place, most likely because
of poor software implementation.<br>
I'm not aware of any way to make it work again and you should
definitly NOT try to make it work again.<br>
Use 10.0.0.0/8 if you need such a big subnet, else go with
172.16.0.0/12 or 192.168.0.0/16<br>
<br>
Max<br>
<br>
<div class="moz-cite-prefix">On 01/12/15 13:43,
<a class="moz-txt-link-abbreviated" href="mailto:george.vargh@wipro.com">george.vargh@wipro.com</a> wrote:<br>
</div>
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<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We are having our test topology running
multiple VMs on a server.<o:p></o:p></p>
<p class="MsoNormal">The guest VMs are linux based and the host
is based on RHEL 6.4.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The eth interface of VMs are interconnected
via ‘intnet’ NIC settings.<o:p></o:p></p>
<p class="MsoNormal">The VMs are using 127/8 IP addresses to
communicate with each other.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We are currently using VirtualBoX 3.1.8 and
everything works fine.<o:p></o:p></p>
<p class="MsoNormal">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.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Based on our testing, it looks like this
behaviour is seen from VirtualBox 3.2.0 onwards.<o:p></o:p></p>
<p class="MsoNormal">Can you please suggest if there is a way to
get these IP address to be allowed?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Best Regards<o:p></o:p></p>
<p class="MsoNormal">George<o:p></o:p></p>
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