Import zone file

Hi all
I have several domains hosted elsewhere. I want to create nameservers on Cyberpanel and import DNS zones. Questions:

  1. Do I need to open both TCP 53 and UDP 53?
  2. How do I import the zones from existing providers, I don’t want to have to manually recreate all the entries? I can’t do a zone transfer since the master is a third party zone file I have no access to.