Checking DNS for CERT VU#800113

 You can use the following web service to see if your DNS servers or resolvers need attention. 

For Windows:

nslookup -querytype=TXT -timeout=10 porttest.dns-oarc.net.
nslookup -querytype=TXT -timeout=10 porttest.dns-oarc.net. DnsServerName

For *nix:

dig +short porttest.dns-oarc.net TXT 
dig @DnsServerName +short porttest.dns-oarc.net TXT

Where DnsServerName is the name of the DNS server you want to check.

You are looking for GREAT, GOOD or POOR in the results.

Original Reference

Written on September 9, 2008