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Sophos UTM

DST Root CA X3 Certificate Expiration Problems and Fix

Today, the DST Root CA X3 certificate expired, leaving many devices on the internet having issues connecting to services and… Read More

3 years ago

Sophos UTM – Untrusted Website Certificate has Expired (May and June 2020)

If you're running a Sophos UTM firewall, you may start noticing websites not loading properly, or presenting an error reporting… Read More

4 years ago

Sophos UTM – The spam filter daemon is unable to reach the database servers

Today (August 9th, 2019, starting in the early morning) I noticed that numerous Sophos UTM firewalls were sending the notification… Read More

5 years ago

Sophos XG Site to Site VPN using SSL to Sophos UTM – Connecting Microsoft Azure to On-Premise Network

Today I'm going to be talking about connecting a Sophos XG firewall to a Sophos UTM firewall for a site-to-site… Read More

6 years ago

Release unused space on host from guest filesystems with thin-provisioned VMDK

The Problem I run a Sophos UTM firewall appliance in my VMware vSphere environment and noticed the other day that… Read More

6 years ago

Sophos UTM – Notification e-mails missing due to SPF Check Failure on fw-notify.net

In the past few days, I've noticed that some Sophos UTM firewalls I manage for clients haven't been sending their… Read More

7 years ago

Sophos UTM Firewall – SNAT, DNAT, 1-to-1 NAT and Full NAT – HowTo

I’ve had my main web server directly on the net for some time now. The box runs CentOS and I… Read More

14 years ago
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