/etc/ipsec.d/policies/private-or-clear is in libreswan 3.23-4.
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 6 7 8 9 10 | # This file defines the set of CIDRs (network/mask-length) to which
# communication should be private, if possible, but in the clear otherwise.
# One IPv4 or IPv6 CIDR per line.
#
# If the target has a TXT (later IPSECKEY) record that specifies
# authentication material, we will require private (i.e. encrypted)
# communications. If no such record is found, communications will be
# in the clear.
#
# 0.0.0.0/0
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