How to play Minecraft SMP (multiplayer) when minecraft.net is down

Currently, minecraft.net is down. When minecraft.net is down you can still play single player, but multiplayer won't work. You can connect to a server, but login will fail with a 503 errror.

To temporarily fix the problem in v1.3, edit the server.properties file stored in the same directory as the server jar/exe. Change online-mode=true to online-mode=false to disable account authorization. Save the file. Restart the server and you'll be able to connect without a 503 error.

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