ASUS RT-AC1200G+: Port Forwarding for Plex Server (192.168.1.7) and Troubleshooting Guide

Hello,

I have a problem with port forwarding on the new router, which despite the settings in all ways (disable hardware acceleration, firewall) does not want to let traffic to the device on the network. In short, I would like to expose the plex server (ip in lan 192.168.1.7) to the world, just like on the old router.

In netiaspot it looked like this:


However, in the new asus like this:


I tested in ASUS on TCP / UDP only - no difference. ASUS does not want to let go of the traffic even if I put ip with plex to DMZ. Configuration from the server side unchanged.
Do you have any ideas, what else can I check?

Did you change the link too? On Asus's WAN, do you have a public IP for this redirect to work?

the link is the same all the time, public IP, I can easily connect to FTP / SSH on this ip from the phone

Do you have access to this server in the local network?

Unfortunately, no, I have access to its management panel (on a different port), but not to the service itself.
FTP connects to internal and external IP

If you do not have access to the server on the local network, how can you have it over the internet? The service / server is down or misconfigured and that's where you need to start your activities.

plex seems to get the confirmation of the user's account from the net and only releases it, normally there is a link to this server on the above-mentioned port in the lan and I am able to manage this service.
However, the information in manual to the router:

Quote:

"CAUTION:
After enabling port forwarding from the ASUS router
blocks unwanted inbound traffic from the Internet and allows only
to responses to requests coming from the LAN. Network client no
has direct access to the Internet and vice versa. "

EDIT:
I did a firmware downgrade and everything works as it should