# OpenConnect

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OpenConnect is a client for Cisco's AnyConnect SSL VPN and Pulse Secure's Pulse Connect Secure.

## Installation

Install the openconnect package.

## Usage

See openconnect(8). Simply run openconnect as root and enter your username and password when prompted:

    # openconnect vpnserver

More advanced invocation with username and password. Input the password after running the command.

    # openconnect -u user --passwd-on-stdin vpnserver

Often VPN providers are offering different authentication groups for different access configurations like for example for a full tunnel or split tunnel connection. To show the different offered auth-groups and to get more information about the connection to the server in general use:

    # openconnect --authenticate vpnserver

Sometimes, connecting to a Cisco VPN, the CSD (Cisco Secure Desktop) mechanism is required (see: https://www.infradead.org/openconnect/csd.html). In that case using the "--csd-wrapper" parameter can help, the wrappers are stored under "/usr/lib/openconnect/".

    # openconnect --csd-wrapper=/usr/lib/openconnect/csd-post.sh vpnserver

#### Juniper Pulse Client

In order to connect to a Pulse Connect Secure server you need to know the SHA-1 of its certificate.

    # openconnect --servercert=sha1:<HASH> --authgroup="single-Factor Pulse Clients" --protocol=nc <VPN_SERVER_ADDRESS>/dana-na/auth/url_6/welcome.cgi --pid-file="/var/run/work-vpn.pid" --user=<USERNAME>

#### Split routing

Split routing can be achieved using vpn-slice-gitAUR in place of vpnc-script, so that you can selectively access hosts over the VPN but otherwise remain on your own LAN. Example:

       sh
       # openconnect gateway.bigcorp.com -u user1234 \
           -s 'vpn-slice 192.168.1.0/24 hostname1 alias2=alias2.bigcorp.com=192.168.1.43'
       $ cat /etc/hosts
       ...
       192.168.1.1 dns0.tun0					# vpn-slice-tun0 AUTOCREATED
       192.168.1.2 dns1.tun0					# vpn-slice-tun0 AUTOCREATED
       192.168.1.57 hostname1 hostname1.bigcorp.com		# vpn-slice-tun0 AUTOCREATED
       192.168.1.43 alias2 alias2.bigcorp.com		# vpn-slice-tun0 AUTOCREATED

## Integration

### NetworkManager

Install the networkmanager-openconnect package, then restart `NetworkManager.service`.

Configure and connect with nm-applet (NetworkManager's icon tray utility from network-manager-applet) or similar utility.

See NetworkManager for details.

### netctl

A simple `tuntap` netctl.profile(5) can be used to integrate OpenConnect in the normal Netctl workflow. For example:

    /etc/netctl/vpn

    Description='VPN'
    Interface=vpn
    Connection=tuntap
    Mode=tun
    #User=root
    #Group=root

    BindsToInterfaces=(enp0s25 wlp2s0)
    IP=no

    PIDFILE=/run/openconnect_${Interface}.pid
    SERVER=vpn.example.net
    AUTHGROUP='<AUTHGROUP>'
    LOCAL_USERNAME=<USERNAME>
    REMOTE_USERNAME=<VPN_USERNAME>
    # Assuming the use of pass(1):
    PASSWORD_CMD="su ${LOCAL_USERNAME} -c \"pass ${REMOTE_USERNAME} | head -n 1\""

    ExecUpPost="${PASSWORD_CMD} | /usr/bin/openconnect --background --pid-file=${PIDFILE} --interface='${Interface}' --authgroup='${AUTHGROUP}' --user='${REMOTE_USERNAME}' --passwd-on-stdin ${SERVER}"
    ExecDownPre="kill -INT $(cat ${PIDFILE}) ; resolvconf -d ${Interface} ; ip link delete ${Interface}"

This allows execution like:

    $ netctl start vpn
    $ netctl restart vpn
    $ netctl stop vpn

Note that this relies on `LOCAL_USERNAME` having a gpg-agent running, with the passphrase for the PGP key already cached.

If pass’ interactive query is wanted, use the following line for `PASSWORD_CMD`:

    DISPLAY=":0"
    PASSWORD_CMD="su ${LOCAL_USERNAME} -c \"DISPLAY=${DISPLAY} pass ${REMOTE_USERNAME} | head -n 1\""

Adjust the `DISPLAY` variable as necessary.

Category:

- Virtual Private Network