Strongswan networkmanager

from source

needed packages

apt-get install libssl-dev network-manager-dev libnm-util-dev libnm-glib-dev libgnomeui-dev gnome-common libnm-glib-vpn

strongswan

wget http://download.strongswan.org/strongswan-5.2.1.tar.gz

tar -xvzf  strongswan-5.2.1.tar.gz

cd strongswan-5.2.1/

./configure --sysconfdir=/etc --prefix=/usr --libexecdir=/usr/lib    --disable-aes \ 
 --disable-des --disable-md5 --disable-sha1 --disable-sha2    --disable-fips-prf \
 --disable-gmp --enable-openssl --enable-nm --enable-agent    --enable-eap-gtc \ 
 --enable-eap-md5 --enable-eap-mschapv2 --enable-eap-identity

make

make install 

cd ..

strongswan networkmanager plugin

wget http://download.strongswan.org/NetworkManager/NetworkManager-strongswan-1.3.1.tar.gz

tar -xvzf NetworkManager-strongswan-1.3.1.tar.gz 

cd NetworkManager-strongswan-1.3.1/
./configure --sysconfdir=/etc --prefix=/usr --libexecdir=/usr/lib/NetworkManager --with-charon=/usr/lib/ipsec/charon-nm

make

make install

• https://wiki.strongswan.org/projects/strongswan/wiki/NetworkManager