OpenConnect is an SSL VPN client initially created to support Cisco's AnyConnect SSL VPN. It has since been ported to support the Juniper SSL VPN which is now known as Pulse Connect Secure.

docker-compose.yml

openconnect:
  image: vimagick/openconnect
  command: https://vpn.easypi.info:4443
  net: host
  volumes:
    - ./data:/etc/openconnect
  stop_signal: SIGINT
  privileged: yes

up and running

$ cd ~/fig/openconnect/
$ tree
.
├── data/
│   ├── certs/
│   │   └── client.p12
│   └── openconnect.conf
├── docker-compose.yml
├── Dockerfile
└── README.md

$ cd ./data/certs/
$ openssl pkcs12 -in client.p12 -nodes -cacerts -out ca-cert.pem
$ openssl pkcs12 -in client.p12 -nodes -clcerts -out client-cert.pem
$ openssl pkcs12 -in client.p12 -nodes -nocerts -out client-key.pem

$ docker-compose up -d
$ docker-compose logs -f

$ ip link show
$ ip addr show
$ ip route show

$ curl ifconfig.co
$ curl ifconfig.ovh
$ curl ifconfig.me