Port forwarding on HUAWEI 5G CPE Pro 2

Hi, friend!
H122-373 is a consumer product, please give me a moment to confirm the problem.
Can you provide the version of the device and your city?

Hy and thanks for the reply! The router was bought in Austria (Magenta Internet 5G Box Pro2), for getting the firmware version (if needed) I would have to start and connect the router at first again. But I don't think that this would be a firmware version issue - although the firmware obviously would have to be updated urgently.

Hi,
I'm looking at this, but for the configuration of port forwarding, can you give a screenshot of the configuration interface? Because I can't figure out what the problem is, if you can log into the device's web interface, you should be able to see the software version of the device to determine if you can fix the problem by updating the firmware.
Thanks!

The latest firmware version 10.0.5.13(H612SP5C1217) is installed. The error message is:

This WAN port range has been occupied by another virtual server, please enter a new range

See screenshot (data blurred):

Hi, friend!
The red message indicates that port 80 is occupied by the device.
I need a little time to verify.

Well, this is very easy to replicate: Just connect any two devices to the router and try to assign port 80 (or which port ever) for both of them. So the port is not occupied by the router, but by the first device. BTW: This behaviour is independent from the NAT setting (cone or symmetric mode). The normal behavior would be to allow multiple bindings. The creator of the menu thought this would never gonna happen, but in fact it is a very common use case (connecting multiple servers of an AD, e.g. a domain controller and an Exchange server, etc.). This should be easy for the dev team to fix. Otherwise, the router is unfortunately useless for business purposes. And please note that this router comes along only as part of business contracts from T-Mobile!

Hi, friend!

Here's a screenshot of the configuration I simulated with your device version:

According to your description, I seem to understand the reason why you failed to configure port forwarding.

Have you added a forwarding rule and then want to add another forwarding rule that only modifies the LAN IP address?

eg:

Rule number one, WAN Port:80, LAN IP:192.168.x.100, LAN Port:80

Rule number two, WAN Port:80, LAN IP:192.168.x.101, LAN Port:80

If this is the case, the rule cannot be added. The prompt on the device configuration interface clearly states that you need to switch to another port because one of the rules already uses WAN port 80.

Thanks!

Unfortunately this is only step 1 of 2 to reproduce. Now please try to assign port 80 to a second device and you'll get the error message. In the worst case your dev team would have to modify/complement the NAT system, but I think it's just a user interface issue.

Yes, I understand what you mean.
However, the current version of the device does not support this operation.
If you want to create multiple rules for the same port,  need to contact the local office for solutions.