I am complete newbie in DNS world and I am moving our office subnet to another domain. Our DNS is using PowerDNS solution with MySQL backend.
I am unsure whether the SOA record for our domain is written correctly. Assuming the domain name is example.com and internal office infrastructure domain is office.example.com, office nameservers are ns0.office.example.com and ns1.office.example.com, then our SOA looks like (in MySQL records table):
ns0.office.example.com. hostmaster.office.example.com. 2013111504 28800 14400 2419200 86400
The values for refresh etc are taken from old configuration and it is not clear whether those values are standard or not.
Question: From all resources I could find on internet i still did not understand what will SOA record affect. Can someone please explain what do first two values affect? What is hostmaster value for? Old config has it as well, but there is no such host on our subnet and no DNS record for this host.