In order to link your domain with your server you can use our dns server for FREE.
Just set this dns on your current domain provider panel.
Primary NS: ns1.panamaserver.com [18.104.22.168]
Secondary NS: ns2.panamaserver.com [22.214.171.124]
Then you need to go to MyDNS, and type the domain there in order to activate the zone in our dns and allow you to manage the records.
*Remember that dns changes could take few hours to propagate.