How can I test DNS cache

[Amie]

I am on Windows 2003 server. I would like to test my DNS server for DNS cache poisoning. But I don't know how to do so! Can you help me how can I test DNS cache?

[Kirt]

DNS cache poisoning is a special situation that provides data to a Domain Name Server that did not originate from authoritative DNS sources. It occur if DNS "spoofing attack" has been encountered. To test your DNS server, below is the command that you can use:

$ dig +short @{name-server-ip} porttest.dns-oarc.net txt
$ dig +short @ns1.example.com porttest.dns-oarc.net txt
$ dig +short @208.67.222.222 porttest.dns-oarc.net txt

$ dig +short @125.22.47.125 porttest.dns-oarc.net txt

[Big Fish]

You can even use "ping" command to check your connection. First use "ipconfig" command to flush DNS as follows:

ipconfig/flushdns

ipconfig/registerdns

This is renew your DNS cache. Finally you can use ping command to check the connection.

ping yahoo.com