Open a web browser and enter the custom VPN URL in the address bar.
It will begin with: https://cuvpn.colorado.edu and then it will be appended with the custom name in this format: /thecustomname.
You will be prompted to install a host checker. When prompted, click on Always Allow.
Wait for the host checker to complete its process. The page will refresh to a new screen when it is done.
If you've never accessed the VPN Web Interface on the web browser you're using, you may be prompted to install a Juniper application. You may also be prompted to accept a certificate, both of which you should do.
Now logged in, you can use the VPN Web Interface to take care of your business.