CPanel - Dns Clustering

I set the DNS clustering via CPanel, but I have 2 questions:

1. I see that the synchronization is only effective on NEW accounts created after the clustering, how do I synchronize the existing DNS zones (and named.conf file)?

2. I had APF firewall on and it did not work untill I removed it, what port do I need to leave open for the DNS clustering to work?(CGI?)

Thanks in advance

 

 

 

 

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