On Mon, 18 Dec 2023 at 02:36, Philipp Hahn <h...@univention.de> wrote: > Am 15.12.23 um 16:21 schrieb Stefan Hajnoczi: > >> Am 05.12.23 um 15:44 schrieb Stefan Hajnoczi: > >>> On Tue, 5 Dec 2023 at 04:53, Philipp Hahn <h...@univention.de> wrote: > >> My main problem currently is cloning the MAC address: As our product is > >> an operating system the MAC addresses of the involved systems is stored > >> in some databases; while in most cases they are not required, I do not > >> want to hunt for these in all kind of different locations and change > >> them to some cloned MAC address. > >> I already had a look at "Virtual Routing and Forwarding"², which allows > >> me to resue the same MAC addresses in different network bridge > >> interfaces, but what I did not yet get to work is the "routing" between > >> them. I found some very nice articles³⁴ on how to do NAT with VRF, but > >> it is not yet working. > > > > I'm not knowledgeable about VRF. You could also use -netdev > > user,hostfwd=tcp::$VM_SSH_NAT_PORT-:22 where VM_SSH_NAT_PORT is a > > unique port assigned by the script that launches the guest. That way > > each guest can have the same MAC address and IP address but receive > > incoming SSH connections. > > Good to know, thank you. My problem is that I have to clone multiple VMs > belonging together, they must be able to communicate with each other > using their unmodified IP addresses; I only need to connect to one of > them from the outside; something like a "jump host".
--netdev user,guestfwd= redirects outgoing connections from a guest. That might allow you to remap the IP/port of each VM as necessary. Stefan
