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-libvirt-managed-virtual-machines-in-fedora/ Regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|
