4:32 a.m.
On Sun, Jul 19, 2020 at 11:54:06AM +0100, Rui Correia wrote:
Greetings folks.
I've setup libvirtd on my manjaro linux laptop.
Got a couple of VM's running (Win10 and Debian10) through NAT without any
issues.
This is what the current network diagram looks like and it works fine:
+-----------------------------------+
| +---------------------+ |
| | +----------+ | |
| | |Win 10 VM | | |
| | |10.1.1.10 | | |
| | +----------+ | |
| Laptop | | |
| Manjaro | +-------------+ | |
| 10.0.0.10 | |Debian 10 VM | | |
+-------->+ | |10.1.1.11 | | |
| | | +-------------+ | |
| | |NAT | |
| | |10.1.1.0/24 | |
| | +---------------------+ |
+------------+ | +-----------------------------------+
|router | |
|switch +---+
|10.0.0.0/24 | | +---------+
+------------+ | |Desktop |
+-------->+Manjaro |
|10.0.0.11|
+---------+
But now I need the debian machine to be accessible from another host on the
lan 10.0.0.0/24 which of course is outside the host.
That network diagram would look like this:
+-----------------------------------------+
| +------------------+ |
| | +----------+ | |
| | |Win 10 VM | | |
| | |10.1.1.10 | | |
| | NAT +----------+ | |
| | 10.1.1.0/24 | |
| +------------------+ |
| Laptop |
+-------->+ Manjaro +------------------------+ |
| | 10.0.0.10 | +-------------+ | |
| | | |Debian 10 VM | | |
| | | |10.2.2.10 | | |
| | | Routed +-------------+ | |
+------------+ | | | 10.2.2.0/24 | |
|router | | | +------------------------+ |
|switch +---+ +-----------------------------------------+
|10.0.0.0/24 | |
+------------+ |
|
| +---------+
| |Desktop |
+-------->+Manjaro |
|10.0.0.11|
+---------+
So, I've setup a 'routed network' for the Debian 10 VM but it's not
working
as I would expect.
The host can ping the Debian VM and the Debian VM can ping the host but the
Debian VM cannot ping the router 10.0.0.1 or any ip address on the internet.
I've been using Virtual Machine Manager to set everything up.
And this is how the routed network is configured
<network connections="1">
<name>routed</name>
<uuid>970a25f7-29b6-4a6b-b890-f593eae4fc15</uuid>
<forward dev="wlo1" mode="route">
<interface dev="wlo1"/>
</forward>
<bridge name="virbr2" stp="on" delay="0"/>
<mac address="52:54:00:bf:35:42"/>
<domain name="routed"/>
<ip address="10.2.2.1" netmask="255.255.255.0">
<dhcp>
<range start="10.2.2.2" end="10.2.2.254"/>
</dhcp>
</ip>
</network>
Any idea on what i might be doing wrong?
Is net.ipv4.ip_forward set to 0 ?
Also, for this to work fully, your router switch needs to know where to
send traffic for the 10.2.2.1/24 network. IOW, you need to configure
static routes on your router switch for 10.2.2.1
I've covered a similar setup to yours here:
https://www.berrange.com/posts/2009/12/13/routed-subnets-without-nat-for-...
Regards,
Daniel
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