DNSTran is a free utility to speed up the process of DNS lookups and to translate IP addresses into domain names in log files. In one step you can lookup IP addresses in your server log file, replace them with the correct domain names, and compress the log file for long term archiving. DNSTran will work with any log file format. When used with Analog it can be 50 times faster, or more, than Analog alone at doing DNS lookups. DNSTran for Macintosh requires OpenTransport.