This file is indexed.

/etc/logcheck/ignore.d.server/passwd is in logcheck-database 1.3.17.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ passwd\[[[:digit:]]+\]: \(pam_unix\) authentication failure; logname=[-._[:alnum:]]+ uid=[[:digit:]]+ euid=0 tty= ruser= rhost= [[:space:]]*user=[-._[:alnum:]]+$
^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ passwd\[[[:digit:]]+\]: pam_unix\(passwd:[[:alnum:]]+\): authentication failure; logname=[-._[:alnum:]]+ uid=[[:digit:]]+ euid=0 tty= ruser= rhost= [[:space:]]*user=[-._[:alnum:]]+$