Verify my Internet DNS or Internet Domain

To test our DNS from internet we can use NSLOOKUP or use Online Tools.

Use the CheckDNS.net analyzer to:

Check if your domain has appropriate DNS servers delegated

See if your DNS servers are alive

Test if your hosting service is functioning

Verify if your DNS servers server the zone corresponding to your domain

Make out if all DNS servers have the same zone version

Check if your WWW-Web server is running

Verify if your hosting service is alive

Test if your mail server is receiving emails

Check if how many backup MX servers are configured within your zone

Test if these backup servers are functioning in case your primary MX is down

Validate if your backup mail server rejects your email in case of a failure because of an not optimal configured open relay restriction

Check your SOA record

Test if all your WWW-Server clustered nodes are up and running with DNS round robin

Web-Tool to get a full report to check if all relevant elements are in "the green range"

Get a step by DNS analysis and find out where the fault can be located, in a case when your Site is down or not reachable

Test if your Web Server is reachable from outside (from the internet)

Online Check if your mail servers are reachable from outside (from the internet)

Test if your Firewall allows the appropriate incoming communication for your DNS, mail, and web servers

Proof your ISP, if the a hosted DNS zone is properly and functioning

Hosting- and web server health check

Jairo Cetina