Portal Version 8.5 will not display assets via a external browser ?

Hi All ,

We running Vignette portal version 8.5 Build 782547 on our development system with OTMM 10.5 and we have a portal site which is called http://dev3.oneecm.com/portal/site/digitalmediahub/ which will not display the assets on the home page when accessed externally via a web browser , it works fine when we use RDP to the system and login into the portal.

Please advise what configuration needs to be made and checked as this has never worked before via a an external browser , could this be a DNS problem for the site digitalmediahub if so where can we make the changes inside the portal configuration ?