Model : TL-MR6400

Hardware Version : MR6400 v2 000000000

Firmware Version : 1.0.15 Build 170912 Rel.75663n

ISP : A1 Slovenia

I am using TL-MR6400 as G3 LTE modem-router.
I am unable to access remote management of my router from outside the network or any computers inside the network.

I tried many options and observed the following strange situation:

If I do System tools->Diagnostic->Traceroute I get IP 192.168.1.1 (I will call this ip1) in the route if I have my router set to IP 192.168.0.1 (I will call this ip0)
If I change the IP of the router to ip1 and restart, then traceroute shows ip0
So basically I can't get the IP of the router to be the same as that shown in traceroute - it is always one setup change behind

The same problem is shown under System Log:
W is always the oposite of my IP: if my ip is 192.168.1.1 then it shows:
L=192.168.1.1 : M = 255.255.255.0
W1=DHCP : W = 192.168.0.100 : M = 255.255.255.0 : G = 0.0.0.0

Another thing I do not understand:
Under status following 3G/4G IP is shown: 10.4.219.*
But trough whatsmyip website I get 188.230.129.* as my IP.