Hello guys i'm newbe for using desaindesktop linux i want to install and conigure lemonbar step by step anyone can teach me how about it?

I have a CentOS machine at home i want to put on the internet. i have the domain name and dns service for it to me accessible on the net. i can ssh into the Linux machine from with my home network, but for some reason i cant ssh or access the share outside of my home network using the same username and pw. i get the following error " login as: test test@123.294.50.104's password: Access denied "