How to set up a network on Debian+DHCP using qemu-KVM?

Question

linux

Initial data:
Debian server, eth0(internet with white IP), eth1(switch with LAN), wlan0(in hotspot mode).

What I want to configure:
DHCP + NAT for the local network is configured on the host system (eth1 + wlan0 bridge), nginx, apache, mysql, postgresql, etc. are installed on the guest machines.

Question:
How to configure the server interfaces so that guest machines receive addresses from the host system and are visible as local machines for the entire local network? And it was possible for web servers (and possibly other machines) to forward a port to an external IP.

Answer 1

tunctl -u yourusername
in the VM, specify the tap0 device for the network (I don’t know what VM you have, I would have known - I’d say exactly what and how)
then consider that the tap0 device is a direct wire to your virtual machine.

Answer 2

-net tap,ifname=tap0

Answer 3

Make a bridge from eth1 and all interfaces from virtual machines