Сan not test the port forward from the internal network.

[Zhekator]

Hello
We have external Internet and the internal network. WAN - a unique IP address.
I tune forward ports (HTTP, FTP, SSH) from the external network to the internal Web server. From the external network everything is fine and works transparently.
But, I can not refer to an external IP address the desired port (for example, by ftp) from the internal network. What am I doing wrong? No answer. What am I doing wrong?
I'm not unders
Thanks in advance for a quick and clear answer.

[KOM]

You need to enable NAT Reflection to access external port-forwarded resources from LAN like that.