/etc/logcheck/ignore.d.server/oidentd is in oidentd 2.0.8-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 | ^\w{3} [ :0-9]{11} [._[:alnum:]-]+ oidentd\[[0-9]+\]: Connection from [._[:alnum:]-]+ \([0-9a-f.:]+\):[0-9]{1,5}$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ oidentd\[[0-9]+\]: Connection from [0-9a-f.:]+:[0-9]{1,5}$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ oidentd\[[0-9]+\]: \[[0-9a-f.:]+\.[0-9]{1,3}\] Successful lookup \(by forward\): [0-9]+ \([0-9]+\) , [0-9]+ : [_[:alnum:]-]+$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ oidentd\[[0-9]+\]: \[[._[:alnum:]-]+\] Successful lookup: [0-9]+ , [0-9]+ : [_[:alnum:]-]+ \([_[:alnum:]-]+\)$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ oidentd\[[0-9]+\]: \[localhost\] [0-9]+ , [0-9]+ : ERROR : NO-USER
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