'pam_tally2.so' denies login attempts with correct credentials with more simultaneous authentications in progress than 'deny=' value

Solution Verified - Updated -

Issue

  • PAM module pam_tally2.so is used for authentication
  • There are more simultaneous login attempts for the same account in progress than deny=X value
  • pam_tally2.so will deny login attempts which number exceed deny=X setting even if the correct credentials are provided

Environment

  • Red Hat Enterprise Linux 5, 6, 7
  • pam_tally2.so PAM module

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