I own a VPS at Go Daddy and have 4-5 website hosted on it. All Website Domain names are purchased from Go Daddy. So, whenever I buy a new domain and host a website on VPS. All I have to do is to point "A Record" to the VPS IP. Now, I have a client who has his own Domain, and wants to shift his website to my VPS. Now he is asking me for Primary & Secondary DNS Server Ip. I'm confused what to do??
Shall I share the IP of GoDaddy's name servers as found in other Domains at Godaddy?
Or Shall I use a Free DNS Service such as https://entrydns.net/ ? If yes, which one is good & FREE?