Port Forward not work!

Hello! :manhappy: Sorry for my english, i try to do the best.

I work and play online videogames out of my home, for this reason in the last 10 years i bought 3 hotspot modem. The first was a Novatell Wireless MiFi, one of the first model, and with it i have not a minimun problem because it is totally open (not have security features, nat, firewall etc...) but not is 4G and today we need 4G :)
The second one was a TP-Link hotspot, great connection but i have some issue with it (one of all, no port forward feature inside control panel and i have a lot of issues with online videogames), for this reason i bought a Netgear Aircard 785S on Amazon (a smooth version, without sim or data plan) because i read that it have a port forward, dmz and upnp, very nice!

My settings:
- DHCP enabled
- my notebook have a static IP
- my antivirus/firewall (NOD32) disabled
- created some rules inside firewall to allow all comunications in/out.
- windows firewall and windows defender turned off.

I tested Aircard with one game in particular, Rainbow Six Siege. first try, open all listed ports on official game forum but didn't work. Second try, activate uPnP but didn't work, last try, turn on DMZ and this worked. Ok good, i resolved all my problems!

Yesterday came out a new game, Toxikk, a game where i can host a custom match/server and i try to do it but without success. My server not listed on server list, and my friend can't connect to it (remaining on the "connecting" screen). I'm already on DMZ and this leave me thinking..... DMZ work or not? Dunno...

From here i done a lot of test... i turned on only uPnP, not work, only DMZ, not work, i turned off all and I open ports one by one, not work, i tried some combinations of DMZ, uPnP and ports, not work. I tried to uninstall NOD32 or disable it, not work.

At this point i checked if ports are open with online tool, like http://www.yougetsignal.com/tools/open-ports/ . I start a server that are listening on port 7777 and i checked on website: the port is closed. I dunno if this online tool is good, because i tried to check a lot of ports and all are closed, also 21 and 80.

At this point my consideration is that port forward not work. but also DMZ? And uPnP? I wrong something? I dunno, i spoke with some friend that can start a server without problem, and he say me that he just open 2 ports, 777 and 27015. I do the same, but my server is not visible and joinable. Why?

I hope someone can help me.. thanks!