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Web Traffic Redirection can trigger a 404 Error when using Proxy Auto Config files not hosted by Web Security Service

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Article ID: 173815

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Updated On:

Products

Endpoint Protection Web Security Service - WSS

Issue/Introduction

When Symantec Endpoint Protection (SEP) is configured to use Web Security Service (WSS) Traffic Redirection (WTR), the client will perform a network probe dependent upon the source of the Proxy Auto Config (PAC) file: PAC File Management Service (PFMS) or another web server. 

Cause

When a PFMS-hosted PAC file is used, SEP downloads from the specified URL and verifies that it is a valid PAC file. When the PAC file is hosted elsewhere, however, the SEP client is hardcoded to try and access a PFMS URL and gets a 404. This can result in issues in a Captive Portal environment with a locally hosted PAC file.

Environment

Microsoft Windows

Resolution

This behavior is resolved with the WTR Engine version 1.1.0.210. This build is downloaded via LiveUpdate.