OpenConnect Setup


OpenConnect is a 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. Palo Altos Global Protect will also be supported in future and of course the own OpenConnect Server.

Step 1 - Installation

Go to System ‣ Firmware ‣ Plugins and search for os-openconnect. Install the plugin as usual, refresh and page and the you’ll find the client via VPN ‣ OpenConnect.

Step 2 - Setup

The setup of the client is very simple. Just tick Enable and fill out VPN Server, Username and Password. Be sure that the FQDN matches the name in the certificate or you will receive an error. Also wildcard certificates can produce errors.

Once enabled, a new interface will be available for specifying firewall rules; Firewall ‣ Rules ‣ OpenConnect will appear.

Step 3 - Troubleshoot problems

To troubleshoot connection problems it’s best to login via CLI and start OpenConnect manually:

# /usr/local/etc/rc.d/opnsense-openconnect start

Look out for errors like

To trust this server in future, perhaps add this to your command line: --servercert sha256:9f97a3395d18093a14f0d8e768dabee231af34d9ba35432dfe838d58dd633333

Now the field Certificate Hash comes into play, so please insert the string above without the hash size and set this one in field Certificate Hash Type.