Can't port forward with iptables KVM NAT

linux iptables port-forwarding kvm-virtualization libvirt

Solution 1:

The example script on the libvirt wiki seems to be missing "-p" in the FORWARD lines, the proper way to issue it is:

sudo iptables -I FORWARD -o virbr0 -d  192.168.122.99 -p tcp --dport 22 -j ACCEPT
sudo iptables -t nat -I PREROUTING -p tcp --dport 22221 -j DNAT --to 192.168.122.99:22

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