I'm wondering if I made a mistake or if this is the normal case. I turned off password based ssh login and changed it to RSA key exchange. After that I changed the ssh port and then I installed UFW. I added ssh to UFW rules and turned UFW on. After that the login via ssh became very slow (>30 seconds). Before it was just some milliseconds. Is this normal or did I something wrong? I'm very new as ubuntu server admin. I hope you can help me to track down this issue.
Thanks a lot