/etc/strongswan.d/charon/attr.conf is in libstrongswan 5.1.2-0ubuntu2.
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 11 12 13 | # Section to specify arbitrary attributes that are assigned to a peer via
# configuration payload (CP).
attr {
# <attr> is an attribute name or an integer, values can be an IP address,
# subnet or arbitrary value.
# <attr> =
# Whether to load the plugin. Can also be an integer to increase the
# priority of this plugin.
load = yes
}
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