External DNS problems

Posted on 2009-05-21
Medium Priority
Last Modified: 2012-05-07
We switched internet service providers and I had to change all public IP addresses. I can access the internet while I'm in the office. We house our own external DNS Servers and I change the IP's within DNS. I can't find our Domain, access OWA, our VPN server or anything from the outside...It has been 10 hours and when I ping the anything of ours from the outside it still shows the old IP address. I don't know what to do now. it's a windows dns server.
Question by:bernardb
LVL 32

Expert Comment

by:Kamran Arshad
ID: 24447968

Are you trying to access certain domains like 'www.mycompany.com'? Usually when you change the A record in zone files of DNS, then it takes usually 24-36 hours to totally propagate and update on all the root name servers.

Expert Comment

ID: 24448078
CHeck with your domain registrar (godaddy, network solutions, yahoo, etc) and see if they have your external DNS servers as authoritative for your domain. If not, make sure you change them to yours and give it a few hours to propagate.
LVL 26

Accepted Solution

jar3817 earned 2000 total points
ID: 24450649
I hope you lowered the time-to-live values on all your public dns records at least a day before making the switch, because if any public resolvers have those records cached, they aren't going to look them up again from your server until they expire. The typical TTL I think is 86400 seconds (1 day).

Also keep in mind, if you had to change the nameserver addresses at the registrar level for your domain, that will take probably a day if not more to update, and there isn't anything you can do to speed it up.

Author Closing Comment

ID: 31584253
"if you had to change the nameserver addresses at the registrar level for your domain, that will take probably a day if not more to update, and there isn't anything you can do to speed it up."


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