Data Control and DLP
Endpoint Security and Control
Sophos UTM 9
Amazon Web Services (AWS)
Definitions & Users
Logging & Reporting
Other Astaro/Sophos Products
Tweets by SophosSupport
Sophos UTM: Certificate validation failed for sites signed by Sectigo root CA
Created: 2 Jun 2020
The issue occurs because OpenSSL checks the certificate chain path which leads to an expired 'AddTrust External CA'.
Sophos UTM: How to remove the Cyren data from WAF blocklist lookups
Created: 30 Sep 2019
This article describes the issue of the Cyren data from WAF blocklist lookups and the steps to resolve it.
DNS over HTTPS (DoH) for web security
Created: 18 Sep 2019
This article describes DNS over HTTPS and its impact to Sophos web security products.
Sophos UTM: How to configure custom web reports
Created: 27 Feb 2019
This article describes the steps to configure a custom web report in the Sophos UTM.
Sophos UTM: HTTPS Scanning CA Install
Created: 27 Aug 2018
This article explains how to install the UTM's Certificate Authority (CA) on Microsoft Windows.
Sophos UTM: Advanced Deployment - High-Performance Scenarios Configuration
Created: 11 Jul 2018
This article describes the steps to deploy a Sophos UTM in high-performance environments/scenarios to maximize throughput and is designed for high-end appliances, although most of the operations can be performed on mid-end ones.
Sophos UTM: Prevent guest network from accessing internal network when using the web proxy
Created: 15 Jan 2018
In a setup where you have a guest network and a secure network the proxy allows connections from the guest network into the secure network.
Sophos UTM: iOS Root Certificate added but not trusted for HTTPS
Created: 5 Jun 2017
This article describes additional steps needed to trust Root Certificates from the UTM on iOS so that it is trusted by the device.
Sophos UTM: How to change the outgoing interface for Web Filtering
Created: 2 Jun 2017
This article explains how to enable a GUI option that can change which external interface traffic from the Web Filter use.
Sophos UTM: Kerberos SSO Authentication for Load-Balanced devices
Created: 26 May 2017
This documentation provides guidance on how to configure Kerberos Single Sign-On in scenarios where customers have load-balanced UTMs that are not in a cluster.