when you make an account you will need the url after putting in your ip as shown in whatsmyip so that it can give you the url ip to put into the ip of the (s)clientinfo.xml and then you need to go into your router and allow that ip url and put in the login and password you used for the site in the ddns settings oh and i almost forgot dont use http:// or https:// in the (s)clientinfo.xml
this will give you a host name to put in the place of your ip and its free!
https://www.dynu.com/ (https://www.dynu.com/)
I went to this site and made an account put my routers ip (as said in whatsmyip when you search it) in after making an account by going to control panel and click DDNS Services then put a ddns onto my routers ip and clicked add then i went into my router 192.168.0.1 logged in went into utilities/ddns put in the login info to dynu.com and the ddns url i made on it RuthlessRO.dynu.net then hit apply then went into (s)clientinfo changed
<address>192.168.0.1</address> to <address>RuthlessRO.dynu.net</address>
(https://i.imgur.com/kdMiw7D.png)
(https://i.imgur.com/S4mX7HQ.png)
(https://i.imgur.com/V4TbwLx.png)
(https://i.imgur.com/6E0sfEV.png)
It's hard to find a place for your topic in this forum since we do not guide users on how to setup their own server (more resource is available in the rAthena or Hercules department). Maybe I will keep it here for those that want to make a home server for testing.