Personal server issues.

Hello. I have made a hamachi server intended for me and friends. Every time one of them tries to join they receive a timed out error.
Any solutions would be appreciated.

To make sure that you guys have a direct tunnel try, through hamachi, right clicking and selecting ping one of your friends; if it times out then that is your problem.

Try re connecting and make sure your friends are connected.

How can that be resolved?

Shut down firewall or allow for an exception is what I did on mine