Dino is a xmpp client, so no server. You have to create an account on a xmpp server to use it, which you can do on a public server or you can install your own s

Dino is a xmpp client, so no server. You have to create an account on a xmpp server to use it, which you can do on a public server or you can install your own server otherwise. Your friends needs a xmpp account somewhere (not required to be on the same domain) and can use any xmpp client to chat with you.