/etc/strongswan.d/charon/eap-mschapv2.conf is in libcharon-extra-plugins 5.2.1-6+deb8u6.
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 | eap-mschapv2 {
# Whether to load the plugin. Can also be an integer to increase the
# priority of this plugin.
load = yes
}
|