Port forwarding to a virtual machine (Libvrt, QEMU, CentOS. WS2012R2)?

Question

iptables

Hello!

There is a Windows Server 2012R2 virtual machine, on CentOS 6.7.
In general, you need to forward the port for FTP.

For example:
external IP xx.xxx.xx.xxx, eth0
Virtual machine IP yy.yyy.yyy.yy, virbr0
In this case?

iptables -t nat -A PREROUTING --dst xx.xxx.xx.xxx -p tcp --dport 21 -j DNAT --to-destination yy.yyy.yyy.yy
iptables -I FORWARD 1 -i eth0 -o virbr0 -d yy.yyy.yyy.yy -p tcp -m tcp --dport 21 -j ACCEPT

Answer 1

iptables -t nat-A PREROUTING -p tcp -m tcp -d xx.xxx.xx.xxx -i eth0 --dport 21 -j DNAT --to-destination yy.yyy.yyy.yy:21