Thanks for the response but this didnt resolve the issue.Workfront is with https and our servers are with http. Could this be the reason for un-successful connection? 

Hello, Workfront provided a documentation on establishing connecttion from AEM to Workfront. Even after following the steps I am unable to publish assets from Workfront to AEM. I am using AEM 6.5 (on prem). This is the error I am seeing in workfront:{ "message": "I/O error on GET request for \"http:...