White blank page is returned when accessing login link from URL https://www.net2phone.com

Products

• Cloud Secure Web Gateway - Cloud SWG

Issue/Introduction

When connected to Cloud SWG (Fromerly WSS) via WSS Agent, and accessing the login link from the following URL https://www.net3phone.com results in a white blank screen as shown in screen shot

Environment

WSS Agent 8.3.1

Cloud Secure Web Gateway - Cloud SWG

Chrome Web Browser

Cause

Capturing a har file shows 403 http response accessing stylesheet and java script from prod.n2p.io domain as shown below

har file showing 403 http responses when accessing prod.n2p.io

 

 

In trouble shooting the issue further tried to follow instructions to disable protocol detection from KB article https://knowledge.broadcom.com/external/article/176450/disable-protocol-detection-on-web-securi.html

but site still returns white blank page and see connection resets happening to the same domain (prod.n2p.io domain) for the stylesheet and java script requests 

har file showing the connection reset error after disabling protocol detection via Cloud SWG portal policy:

Resolution

Added bypassed domain entry for prod.n2p.io domain to the Cloud SWG portal Bypassed domains tab following instructions included in Cloud SWG documentation under "Procedure - Manually Add Domain Entries" section

After adding the bypassed domain for prod.n2p.io domain, performed a manual reconnect on the WSS Agent to retrieve the newly added bypassed domain entry

https://techdocs.broadcom.com/us/en/symantec-security-software/web-and-network-security/cloud-swg/help/content_filtering_sol/adm_bypassdomain_ta.html