Launch Minecraft without logging in?
I'm looking to setup a Minecraft LAN server on my college's computers (I do a game development course and am currently on networking so this is relevant). Also, just before I get started, I own a legitimate Minecraft account.
There is one slight problem. I think Java may be blocked in the firewall (which I can't access because I'm a student) because when I try to login to the launcher it throws this error:
ConnectException: Connection refused: Connect
My question is this: Is it possible to launch the game without having to log in? I already have the game files from AppData copied over onto a flash drive (which I'm trying to run it from.
I heard from this question that you could launch it with a command while getting a username and session ID from here: https://login.minecraft.net?user=<username>&password=<password>&version=13 but as that is a request to the login servers, it may or may not work at college. Is there any better way to launch it?
P.S. Counter-Strike and Cube 2 multiplayer worked so I know the LAN server will be okay. It's just launching the game I need help with.
Best Answer
What I have done that works, but only if you've opened the game once and logged in prior to this and saved the settings/profile, is to make sure no instance of the game not the loader is running. Then disable your internet, load the launcher and it should say 'play offline'. Press and play, once the game is loaded you should be able to safely reenable your internet.
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Can I play Minecraft without an account?
Minecraft is a single player game. A Microsoft account was not required when I bought it.Can you play Minecraft Java without an account?
Having a Microsoft account was not a must for playing Minecraft all these years but it will be from 2021, as per a blog post by Minecraft. If you own the original version of Minecraft, you need to have a Microsoft account if you wish to play next year onwards.Can you play Minecraft without being online?
Yes, Minecraft can be played offline. You just have to set up things or make changes to some configurations to force the game to operate without an internet connection.How to login to Minecraft Java after account migration
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Answer 2
One thing you could try is to make a VPN tunnel to your house and have the game authentication happen through your home internet. You'll have a little bit of latency but if you're running local it wont matter. If you want local multiplayer this might not work very well however.
Another idea is use a program like MultiMC (Which is 100% legitimate and follows the TOU of Minecraft) with it as long as you've authenticated yourself once you should be able to start Minecraft with "Play Offline" to play single player or insecure local multiplayer.
Answer 3
At my school (university), there is no possibility to login into any MC server, too. I did not tested on school computers, just at my laptop using Eduroam wi-fi, but the network is same - school one...I assume you will have similar one.
The thing is that I CAN connect (or launch MC at all, now just don't remember, if it gets valid token), BUT I even cannot ping servers in Multiplayer menu.
Same is with web-console for server, it just cannot connect. I experienced same behaviour also with some other games.
Resume: There are probably blocked game ports on the network, because it is for educational thingies only. The solution would be to use some "valid" ports, but hey, that might be quite advanced thing, but probably not impossible. Try to scan your network to get more info about it.
PS: You need to login at least once from that computer to have valid session, but I quite don't know if MC uses same ports to communicate with Mojang servers as with MC servers (probably yes). If yes, there might be way to just force it to use another port (which is open by school network), then it could all work as expected.
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