Web Isolation: DNS Connectivity from TIE Gateways to the Internet

Products

• Web Isolation

Issue/Introduction

This article is intended for users of SymDiag. Though general readers may benefit from the article’s contents, any solutions, insights, or guidance are geared toward those using SymDiag.

Problem

The Web Isolation platform is unable to browse the internet due to the absence of DNS servers.

Cause

A server without DNS cannot resolve URLs into IP addresses, and hence connections will fail.

Resolution

Using the management console UI, the Web Isolation administrator should verify that a DNS server is defined.

For further information, see the Symantec Threat Isolation Platform (STIP) Guide for Administrators section on Configuring Security Policy Settings > Configuring System Certificates.