This file is indexed.

/etc/logcheck/ignore.d.server/netconsole is in logcheck-database 1.3.18.

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} [ :0-9]{11} [._[:alnum:]-]+ kernel: netconsole: (local|remote) port [[:digit:]]{2,5}$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ kernel: netconsole: interface [[:alnum:]]+$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ kernel: netconsole: (local|remote) IP [.[:digit:]]{7,15}$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ kernel: netconsole: remote ethernet address [:[:xdigit:]]{17}$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ kernel: netconsole: network logging started$