ZTE MF823 4G - change IP of Modem and get Public IP forwarded to the Router...

The ZTE MF823 4G Modem is a kind of Modem which you Plug in to the Router or Computer and it should just work. Yes it does.... You Plug it in and the connection is already established.

This makes since a bit more difficulty as the Modem has its own DHCP and IP Range which it uses. The Modem has also its own Firewall which blocks all incoming traffic. As I have a public IP and use the Modem with my Router, I would like to get the WAN traffic forwarded to my Router.

I couldn't manage (yet) to get the real "Port Forwarding" working, but as after the modification I could use the DMZ where I entered the IP of my Router. So this means that all the traffic coming to the public IP will be forwarded to the Router where the Router Firewall will block stuff if needed.

For the connection to the Modem we just need to do a telnet which can be done from Windows or Putty which I prefer. The IP for the ZTE MF823 4G is standard 192.168.0.1 what I didn't change yet.

The Login and Password are the below:

Username: root

Password: zte9x15

After successfully login to the modem it should look like this:

 OpenEmbedded Linux 9615-cdp  
 msm 20130829 9615-cdp  
 9615-cdp login: root  
 Password:  
 root@9615-cdp:~#  

Asus Router (Asus-WRT) LTE Modem Support ?

I baught some monh ago a router special because of the Support for 3G/4G, and printer sharing What Asus even advertise on the page.

Well it works fine but the issue they use the ppp to make the dial-up connection to the ISP. What we know about ppp ?

PPP has speed limits what maybe could reach max. 25 Mb/s of speed and more the protocol will not reach.

There was even a release where they added the cdc_ncm driver to the build and it worked fine. CDC-NCM is the high speed driver which is used for my Huawei Device E3267 which can reach the speed the ISP provides. The RT-AC56U with a external USB Plug (powered one) worked great and I didn't had and issues with this. The connection was stable and fast, so I could have reached 75Mb/s which is this what I should have (max 100 Mb/s).

Anyway they removed this again from the Build, but the driver was still there so there was one more workaround to use a script to get it connected with the fast driver but from this what I see that in the latest releases it isn't working anymore.

I opened even a case with Asus and the result was the 4G is not supported on the router as the Hardware can not handle it.....

So for what making advertisments about this, when Support later tells that this is not supported ? Good Work ASUS !