ok. Let's try this.
- add '10.0.2.15 ubuntu.gluu.info' in c:\windows\system32\drivers\etc\hosts file on your windows 10
- Add same entry in /etc/hosts file of your virtual box, outside chroot environment (You will need to exit from gluu server env).
- make sure no firewall is blocking tracking to/from Windows and Virtual box
- Access https://ubuntu.gluu.info from your windows 10 browser.
let me know how it goes.