1. Android Central Question's Avatar
    Hi All,

    Really hoping there is an expert amongst you to answer my questions.

    I am USB-tethering my mobile internet to my notebook from my Huawei P9 device.

    Basically, I am looking for ways to change my NAT settings from Strict to Open type. I am trying to play some games with friends online, and there is no way to solve this issue so far.

    Operation System: Windows 10
    At Windows Defender Firewall and Advanced Security options, I have checked that not specific, but all ports are opened for my games, so that shouldnt be the problem. I doubt that two service would try to use the same ports.

    Also been looking for some apps on the Play Store to manage port forwarding. There is one app so far which seems to solve this, but after setting up and opening specific ports, it still doesnt work.

    As my device does not provide a gateway what I could access from my browser for manual port opening, I dont know what else could I do.

    Installed a network utility app, which has an option to discover ports for my IP address. You have the option to do that for your IPv4, DNS1 and DNS2 addresses. Makes no sense, but it only shows like 3-4 opened ports.

    Could you give me a hint how to manage this? I have been searching online for ages to find a solution and no luck.

    Really appreciate any tip in advance.

    Gaspar
    07-15-2018 12:30 PM
  2. Rukbat's Avatar
    Short answer - you probably can't. Read the rest for the long answer.

    Operation System: Windows 10
    At Windows Defender Firewall and Advanced Security options, I have checked that not specific, but all ports are opened for my games
    That's just for the firewall - no games are blocked from using any ports.

    so that shouldnt be the problem. I doubt that two service would try to use the same ports.
    Many of them could use port 80 - the standard website port. But that still wouldn't be a problem - the firewall isn't blocking that.

    Also been looking for some apps on the Play Store to manage port forwarding. There is one app so far which seems to solve this, but after setting up and opening specific ports, it still doesnt work.
    That has to be done at the router level. What's the arrangement? Internet into the phone, then to the Windows computer? Then you have to forward ports in your tethering or hotspot app, since that's your router.

    As my device does not provide a gateway
    The gateway is the fateway address the Windows computer sees when you go into a cmd window and type

    ipconfig/all

    what I could access from my browser for manual port opening, I dont know what else could I do.
    As I said, you have to forward ports in the router, which in your case is your tethering or hotspot app.

    Installed a network utility app, which has an option to discover ports for my IP address. You have the option to do that for your IPv4, DNS1 and DNS2 addresses. Makes no sense, but it only shows like 3-4 opened ports.
    Shields Up will do that (show you all open ports) - but that's only the ports open in your tethering or hotspot app - and by your carrier before that. If they firewall almost all incoming ports, almost all incoming ports are firewalled, no matter what you do on your phone.

    Could you give me a hint how to manage this? I have been searching online for ages to find a solution and no luck.
    The problem isn't with the phone - your carrier normally doesn't allow incoming requests. There's no need for them on a phone, normally, except for people trying to find your phone to connect to it to force some "phone home" type of app, to send them all your passwords, bank accounts, etc. And I doubt that you could get them to open incoming ports to your phone. So the connection attempts from others stops at the carrier and never gets to your phone, so no matter what you open, it's not going to help.

    (If you're doing it the other way, internet to router to Windows PC to phone, just forward the ports to the phone in the router. Connect the phone to the router over wifi. Done. If you want to use the mouse and keyboard, use an OTG adapter.)
    07-16-2018 03:05 PM

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