Current ISP is closing it's doors. They also host our DNS records(about 5 total...MX, A, SPF and SRV). New ISP will have new circuits up this Friday, but it looks like they don't include hosting nameservers without paying extra, so I thought I'd just use my registrar(register.com) as our nameserver(s) and host the DNS records there for free. Since my servers(email and VPN appliance) will now have new public IPs(both are Nat'd on the firewall), is there a way to seamlessly transfer over with no/minimal downtime?
In a nutshell:
OLDISP hosts our MX record, autodiscover record, A record for VPN and SPF record. All of these records are using public IP addresses provided by OLDISP. Currently, when I look up our nameservers on register.com, they point to the nameservers hosted by OLDISP.
NEWISP has given me a new block of public IP addresses to use for my records. I would like to use register.com to manage my records as well as be my new nameserver(s).
I can't figure out how to do this on a Friday afternoon with little to no downtime..... Thanks for any advice/suggeastions.