I have a debian 10 host and I am running a debian 10 guest using NAT. I am using libvirt/KVM/QEMU

host public ip: x.x.x.x
guest ip: 192.168.122.99

I am trying to forward port 22221 to port 22 in the guest for me to access the guest via ssh from the outside. I want to connect to the guest via ssh directly using ssh -p 22221 x.x.x.x

I am following this tutorial: https://wiki.libvirt.org/page/Networking#Forwarding_Incoming_Connections

I also tried countless other tutorials, and none worked. In particular I have no idea why the following does not work:

(inside host)

1- I shutdown the guest vm using virt-manager

2- I manually call the hook script ip tables to forward the port

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

3- I start the guest vm and check that ssh 192.168.122.99 is working

4- Now I try to connect using ssh -p 22221 localhost and it refuses connection.

I also tried to check the port nmap -p 22221 localhost and it says it is blocked.

iptables -L (host)

Chain INPUT (policy ACCEPT)
target     prot opt source               destination                                                                       
ACCEPT     udp  --  anywhere             anywhere             udp dpt:domain
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:domain
ACCEPT     udp  --  anywhere             anywhere             udp dpt:bootps
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:67
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:http

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination
ACCEPT     all  --  anywhere             192.168.122.99
ACCEPT     all  --  anywhere             192.168.122.0/24     ctstate RELATED,ESTABLISHED                                                                    
ACCEPT     all  --  192.168.122.0/24     anywhere
ACCEPT     all  --  anywhere             anywhere
REJECT     all  --  anywhere             anywhere             reject-with icmp-port-unreachable                                                              
REJECT     all  --  anywhere             anywhere             reject-with icmp-port-unreachable  

ip a (host)

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: enp2s0f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 00:25:90:97:dc:6e brd ff:ff:ff:ff:ff:ff
    inet x.x.x.x/23 brd y.y.y.y scope global enp2s0f0
       valid_lft forever preferred_lft forever
    inet6 fe80::225:90ff:fe97:dc6e/64 scope link 
       valid_lft forever preferred_lft forever
3: enp2s0f1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 00:25:90:97:dc:6f brd ff:ff:ff:ff:ff:ff
4: virbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 52:54:00:60:e8:80 brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
       valid_lft forever preferred_lft forever
5: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN group default qlen 1000
    link/ether 52:54:00:60:e8:80 brd ff:ff:ff:ff:ff:ff
7: vnet0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master virbr0 state UNKNOWN group default qlen 1000
    link/ether fe:54:00:e4:c2:52 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::fc54:ff:fee4:c252/64 scope link 
       valid_lft forever preferred_lft forever

ip a (guest)

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: enp1s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 52:54:00:e4:c2:52 brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.99/24 brd 192.168.122.255 scope global dynamic enp1s0
       valid_lft 2500sec preferred_lft 2500sec
    inet6 fe80::5054:ff:fee4:c252/64 scope link 
       valid_lft forever preferred_lft forever