@Woti said in Fedora 39 Server as host with HAproxy and Qemu/KVM virtual machines. Trouble with communication.:
Yes, I tried bridge mode. That hadn't worked. But I found the error at least and the bridge between the host and the VMs works now. I can ping the VMs from the host and vice versa, with IP address and domain name.
However, I can only reach the VMs via their local IP address, not via the domains when using a browser.
I think you should first solve the issue why you can't reach your VMs from outside your LAN (I mean before you setup HAproxy).
I would first test, can I reach them via external IP address. (have you tried this?)
If that is OK, then test access via DynDNS domain.