21 October 2011

Public DNS look up for corporate users

Companies that have the same internal domain name as the external public domain name would run into this problem.  To resolve an ip address from a DNS name you can simple do an nslookup.  But what happens if you want the public IP?  Attempting to resolve the IP internally would only return the internal IP address.

Using an internet based look up tool such as http://www.ipchecking.com allows for this.  

Nice features of this site are:

  • Returns the public IP of the queried hostname
  • Resolve your public IP address
  • Identifies if you are using a proxy
  • Provides extended WHOIS information

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