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Another free Perl script to check the listener log
December 14th, 2005 by Pete
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I talked a few days ago about a free script that Ivan had posted to my Oracle security forum. On Monday David has posted another free Perl script in a thread titled "Re: Detecting brute forcing listener password" that can be used to monitor the listener log to check for TNS-01169 errors. The script has to be restarted if the log is rotated. You can define the interval between checks and also the number of errors as a threshold to trigger if an email is sent. This is a good simple script and very useful to check for attacks against the listener.
