alpine-strongswan

put the normal strongswan /etc files and folders in a folder names 'config'

then start the container using:

shared network with host, privileged container

docker run -d
--privileged
--net=host
-v $PWD/config/strongswan.conf:/etc/strongswan.conf:ro
-v $PWD/config/strongswan.d/charon.conf:/etc/strongswan.d/charon.conf:ro
-v $PWD/config/ipsec.conf:/etc/ipsec.conf:ro
-v $PWD/config/ipsec.secrets:/etc/ipsec.secrets:ro
-v $PWD/config/ipsec.d:/etc/ipsec.d:ro
--name=strongswan
thinghub/alpine-strongswan

confined network, container

docker run -d
--cap-add=NET_ADMIN
-p 500:500/udp -p 4500:4500/udp -p 1701:1701/udp
-v $PWD/config/strongswan.conf:/etc/strongswan.conf:ro
-v $PWD/config/strongswan.d/charon.conf:/etc/strongswan.d/charon.conf:ro
-v $PWD/config/ipsec.conf:/etc/ipsec.conf:ro
-v $PWD/config/ipsec.secrets:/etc/ipsec.secrets:ro
-v $PWD/config/ipsec.d:/etc/ipsec.d:ro
--name=strongswan
thinghub/alpine-strongswan