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Minecraft LAN Issues

Pierre -  
Hello, I'm in confinement at my girlfriend's place and we are playing Minecraft over a local network. So far everything was working well, but now she can no longer see the games I'm sharing. If she hosts the game, I can see and join it, but not the other way around. She doesn't have a router yet, so we are playing using a hotspot from a phone (we don't need the internet, the phone just acts as a link between the two PCs).
Any idea what could be wrong?
Thanks in advance
Pierre

8 answers

  1.  avion-f16
    Hello,

    The smartphone acts as NAT; attempting to access the computer connected through the smartphone's network sharing from the LAN is akin to trying to access a computer in the LAN from the Internet.

    The computer connected to this smartphone has a default route via the smartphone, which itself has a default route via the router. It can therefore access both the LAN and the Internet.

    The computer in the LAN has a default route via the router, which is unaware of the other network created by the connection sharing "behind" the smartphone. The router cannot direct the computer in the LAN to the computer in the "sub-LAN" via the smartphone.

    A very simple solution would be to connect the two PCs with an RJ-45 cable and manually configure the IP addressing.
    1. brupala
      Hi,
      no, if I understand correctly, the two PCs are connected via wifi to the shared network of the smartphone, it's like the smartphone is a 4G router.
      There should rather be a firewall on the PC or one of the PCs is on a public network or configured to be invisible on the network.
      But it’s true that a direct cable between the two PCs would solve a lot of issues and provide better performance.
  2. Pierre
    Yes, the phone acts as a box. Direct cable not possible, one of the PCs doesn't have an RJ-45 port... I looked a bit into the firewall but I must admit I don't understand much about it.
    1. brupala
      Check whether it's private/public network or network visibility in the network settings.
      Are both on Windows 10?
    2. Pierre
      @brupalaI tried the trick by completely disabling my firewall and I am still invisible. Both computers are Windows 10.
    3. brupala
      @PierreAnd so the visibility on the network?
      Before going any further ...
  3. Pierre
    I can't find it :/ I don't know this parameter.
    1. brupala
      It's true that they've switched back to private/public instead of visible or not, they're really annoying at Microsoft :-(

      You choose private.
  4. Pierre
    Okay, I did it but it doesn't change anything. I also reinstalled the game (just in case) and there's still no change.
    1. brupala
      a firewall alakon?
      I may have already asked this, sorry if you've answered it before.
  6. Pierre
    The Windows Defender firewall, the basic one. But even when I disable it (private network and public network), it doesn't work.
    1. brupala
      Well, I don't know...
      Have you changed your local IP address?
      How do we connect to a Minecraft server?
  7. Pierre
    I haven't touched the IP. For Minecraft LAN, there's no need for a server; you start a single-player game and then click "Open to LAN." At that point, people connected to the same network can see it in the multiplayer section under "LAN Games" and join. Right now, if I click "Open to LAN" on my PC, the other PC can't see it. However, if it's the other PC sharing, then I can join.
    The thing is we're playing on my map; I also play solo on it. Currently, we manage by transferring the map files back and forth between the PCs at the start and end of each multiplayer game, but that's becoming annoying, and I'd like to resolve the issue (especially since it was working perfectly just a week ago...
    I'm a bit out of ideas here... I did a major Windows update recently, but I don't see how that would have changed anything. In any case, thanks for the help! :)
    1. brupala
      OK,
      so it would be broadcast in multicast.
      I suppose your IP address is automatic, so it can change, especially on mobile sharing.
      You need to first check the IP address of the other PC and if you can ping it.
      Commands:
      ipconfig
      arp -a
      ping
  8. Pierre_7939


    I admit that I don't quite understand what I need to do.
    1. brupala
      ping 192.168.43.88
      logically, it's the other PC
      yours 192.168.43.213 and the smartphone 192.168.43.224
      Is it from the server PC?
  9. Pierre_7939
    It's from my PC (the one that's invisible to the other PC).
    1. brupala
      OK,
      but I still don't see why the ping goes both ways, I assume.