/etc/logcheck/ignore.d.workstation/autossh is in autossh 1.4c-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ autossh\[[[:digit:]]+\]: starting ssh \(count [[:digit:]]+\)$
^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ autossh\[[[:digit:]]+\]: ssh child pid is [[:digit:]]+$
^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ autossh\[[[:digit:]]+\]: ssh exited prematurely with status [[:digit:]]+; autossh exiting$
^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ autossh\[[[:digit:]]+\]: received signal to exit \([[:digit:]]+\)$
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