CheckDns.net DNS Quick Check, DNS Report Tool, Test your DNS delegation
Title
DNS Quick Check
Description
Imagine typical situation: as a systems administrator, you register new domain name (say, yourdomain.com), configure primary and secondary DNS servers, set up mail server to receive mails, make www.yourdomain.com to point to your web-server - a lot of easy steps. So easy that nobody is willing to spend enough time doing it.
However, one of Murphy's Laws says: "If anything can go wrong, it will. If anything just cannot go wrong, it will anyway". You can mistype name of mail server or name of secondary DNS. Another time your firewall can be blocking requests to name servers, so www.yourdomain.com doesn't open from "outside". And so on.
- In company X, backup MX (mail server) was configured wrong. Everything was fine, until mail server #1 crashed. It took one day to bring server back online. During whole day, backup MX was rejecting all incoming mails as SPAM. It would be much better to have no backup server at all!
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A service to to test your DNS servers - www.CheckDns.net
