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I know that this server I have been trying to get on is up but when I type my password in it keeps saying connecting. I know it is up because of the Admin and another one of my friends that gets on it. I type my password in correctly and I can get on other servers, so what is the problem? The admin keeps telling me I type my password wrong, but I logged on it earlier and it worked, I type the same password in now and it doesn't. When I first had this issue was right after I timed out 1 time.

Try pinging the server. sometimes you can see a server but it won't mean still can connect to it.

If on Windows use CMD and do ping <server address>
If linux Idk since I use Windows.

I know this issue from Minetest 0.4.7, haven't got any big connecting problems since then.
A ping to the server could be useful (as Alt. Tester already said above).
Or just ask the server owner to restart minetestserver, maybe it helps.

Alt. Tester wrote:Try pinging the server. sometimes you can see a server but it won't mean still can connect to it.

If on Windows use CMD and do ping <server address>
If linux Idk since I use Windows.

To mimic Windows ping in Linux, sending four packets:

Not using the -c flag will ping until you hit ctrl-c.