[dns-operations] open resolver testing tool

Duane Wessels wessels at packet-pushers.com
Tue Feb 28 07:07:51 UTC 2006

If anyone has the need to test particular addresses for the
presence of open resolvers, please feel free to use this tool:


It will send a single "recursion desired" query to a target address.
If that query is forwarded to our authoritative server, the host
has an open resolver running at that address.

Duane W.

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