3. Connection redirected from service port X to Y in destination host

Scenario 3.
Destination nat: internal host A connects to internal host B but gets redirected to external Y.

192.168.0.2->192.168.0.1:20022 becomes 192.168.0.2->192.168.0.1:22

Internal host 192.168.0.2 wants to connect to 192.168.0.1, port 20022 Host 192.168.0.1, redirects connection towards port 22, where ssh server listens.

In the picture above, you can see what happens in IPFIRE port redirection.

Scenario 3. Destination nat: internal host A connects to internal host B but gets redirected to external Y.

Scenario 3.
Destination nat: internal host A connects to internal host B but gets redirected to external Y.