In the 1.17 this won't work

[martinlacorrona]

https://minecraft.fandom.com/wiki/Java_Edition_21w13a
See: MC-136551 bug fixed

Now what guys?
What can we do?

[DataPools]

It really depends on what Mojang’s new blacklist implementation is.

If someone figures out how the 1.17 blacklist works, there might be a way around it.

Edit: Based on some quick tests, it appears to check if the IP has an SRV prefix _minecraft._tcp in front of it, and removes it if it does. Simple, but effective. You can view the new change in the Bootstrap class in the patchy library.

[martinlacorrona]

Mmmmm, I see it now.
I'm thinking but I don't know what we can do rigth now with this, hide the IP? I don't know...
What do you think?

[DataPools]

The only solution I can currently think of is cycling through IPs frequently, but that may not bode well with the player base.

[martinlacorrona]

Yes, but I understand that in some moment you will get banned all ips from your server..

[DataPools]

Theoretically, someone could make some sort of mod (maybe Fabric?) that could bypass the blacklist by modifying the isBlockedServer() method.

[martinlacorrona]

Yes, but in this case you force player to user a different version of the game.

This is the problem, that right now the player didn't need to use other launcher or mods to play blocked servers, but right now... I don't know.
I'm out of ideas.

[Scifi9902]

What if you create a modified version of the game that simply always returns true for the isServerBlocked method? (I don't deal with clients much so I may sound braindead here) then they could simply just use the same launcher just a different jar?

[DataPools]

Yes, it’s quite a possibility. I believe SquidHQ tried to do just that.

[LucidAPs]

Unfraternally the SRV trick doesn't seems to work in 2022.