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Lrdns - Log Reverse Domain Name System

Description | System requirements | Sample usage | Download | Mailing list

Description

Converts numeric IP addresses in access log files into textual domain names.

E.g., this type of log with numeric IP addresses: 

153.1.20.77 - - [29/Jan/1999:08:39:48 +0200] "GET /~ktmatu/mathgraph.html HTTP/1.0" 200 831
171.64.36.40 - - [29/Jan/1999:08:43:04 +0200] "GET /~ktmatu/rate-usd.html HTTP/1.0" 200 10780
133.205.44.137 - - [29/Jan/1999:08:49:16 +0200] "GET /~ktmatu/rate-eur.html HTTP/1.0" 200 10719

Looks like this after the conversion: 

ml50pc7.uta.fi - - [29/Jan/1999:08:39:48 +0200] "GET /~ktmatu/mathgraph.html HTTP/1.0" 200 831
pigott-104.Stanford.EDU - - [29/Jan/1999:08:43:04 +0200] "GET /~ktmatu/rate-usd.html HTTP/1.0" 200 10780
Ntk15DS45.tk1.mesh.ad.jp - - [29/Jan/1999:08:49:16 +0200] "GET /~ktmatu/rate-eur.html HTTP/1.0" 200 10719

System requirements

Sample usage

Convert log.txt and dump results to stdout:
$ ./lrdns.pl log.txt
Convert log.txt and dump results to converted_log.txt:
$ ./lrdns.pl log.txt > converted_log.txt
Convert log.txt on the background and dump results to converted_log.txt. logout can be given to exit from a session.
$ nohup ./lrdns.pl log.txt > converted_log.txt &
Fetch log from the net and dump results to stdout:
$ lynx -source -dump http://www.example.com/log.txt | ./lrdns.pl
Convert log.txt on the background, compress results, and send them to my.email@example.com.
$ nohup ./lrdns.pl log.txt | gzip | uuencode converted_log.txt.gz | mailx -s "Converted log" my.email@example.com &

Download

Mailing list

The Lrdns announcement list is for announcements regarding new versions, bugs, etc. You are expected to receive just a few messages per year from this list. To subscribe, send a blank email message to <lrdns_announce-subscribe@yahoogroups.com>.

Author

Matti Tukiainen, ktmatu@nic.fi

 
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