Here is a great step by step help article for you or your clients for installing and logging to the Sophos SSL VPN Client.
Step 1: Open your preferred web browser (Ex: Google Chrome)
Step 2: At the top of your browser in the address bar, enter the public IP address of your network (Ex: https://169.254.30.211)
Step 3: You will get a warning that your connection may not be private. Simply bypass this page by clicking "ADVANCED" and then "Proceed to..."
Step 4: Login with your given user credentials
Step 5: Click "Download Client and Configuration for Windows" and then the download should begin. After the download has finished, double-click it to start the setup.
Step 6: Click "Run" on the Security Warning.
Step 7: once the installer has started click "Next"
Step 8: Read through the license agreement and then click "I Agree"
Step 9: Verify the location of where you want the application to be installed, then click "Install"
Step 10: In the windows security pop-up click "Install"
Step 11: Once the install process has completed click "Next" then "Finish"
Step 12: Now that you have the SSL VPN Client installed you'll now want to establish your connection.
A) Access your hidden tray icons
B) Look for the icon that has 3 squares one of them being red
Step 13: Right-Click the VPN icon and select "Connect"
Step 14: Login with the same Username and Password used in "Step 4"
Step 15: Verify your connection by seeing if the tray icon went from Red to Green