Updated: 12/09/1999

jdresolve

The jdresolve application resolves IP addresses into hostnames. To reduce the time necessary to resolve large batches of addresses, jdresolve opens many concurrent connections to the DNS servers, and keeps a large number of text lines in memory. These lines can have any content, as long as the IP addresses are the first field to the left. This is usually the case with most formats of HTTP and FTP log files. For addresses that can''t be resolved due to timeouts or incorrectly configured reverse mappings, a recursive algorithm is available. A search is made for the parent domains (classes C, B and A) of the IP address and those domain names become available for composing a fake hostname, thru a user defined mask. Included is a tiny shell script called rhost to interface with jdresolve when resolving a single IP address. Think of it as a smart replacement for the ''host'' utility that comes with bind-utils.

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