This file is indexed.

/etc/ppp/ioptions is in ipppd 1:3.25+dfsg1-3.7ubuntu1.

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

The actual contents of the file can be viewed below.

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# The debian configuration does not use this file.
# Please use isdnconfig to create /etc/isdn/ipppd.DEVICE .
# Read the isdnconfig manpage for more info.