/etc/logcheck/ignore.d.server/mountd 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.
1 | ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ mountd\[[0-9]+\]: authenticated (un)?mount request from (([0-9]|([1-9]|1[0-9]|2[0-4])[0-9]|25[0-5])\.){3}([0-9]|([1-9]|1[0-9]|2[0-4])[0-9]|25[0-5]):[0-9]+ for [._/[:alnum:]-]+ \([._/[:alnum:]-]+\)$
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