Blog
Product updates, new features, technical deep dives, and behind-the-scenes stories from the Oh Dear team. You can also subscribe via our RSS feed.
The ghost domain problem in DNS, and what we're doing about it
There's a DNS edge case that even people who know DNS well tend not to have run into: a domain pulled by its registry can keep appearing healthy to uptime checkers for days after it's gone. The .de zone triggers it when contact verification fails, and other registries have their own versions. We…
Kickstarting our reseller program with Zone & Ploi Cloud
We've quietly been building a reseller program over the past months. The idea is simple: let hosting providers, deployment platforms, and agencies offer Oh Dear monitoring directly inside their own products. Not a stripped-down version, the full thing. We're working with several partners to bring Oh…
5 tips for managing client sites with Oh Dear
Managing dozens (or hundreds) of client sites can quickly become chaotic without the right tools. Whether you're running an agency, internal platform team or dev shop, visibility and control are everything. That's where Oh Dear comes in. Oh Dear is an all-in-one monitoring service that gives you a…
Here are 10 ways to prevent website downtime
Every minute of website downtime cost large organizations an average of $9,000. That’s half a million dollars every hour, damn. And that’s just the average. If your organization heavily relies on your website to do business, that cost can increase even further. Needless to say, preventing…
How does website monitoring even work?
Every website manager knows that feeling when you look at your inbox only to find a customer notifying you that a core page of your site is down. The worst part of it all, you don’t know how long that page has been down for. If you’ve yet to experience that, count your blessings. Well, unless…
Status Page Templates: Incident & Maintenance Examples You Can Copy
We know how crucial it is to provide clear and timely communication during incidents or downtime. That’s why we’re excited to introduce Status Page Update Templates - a new feature that makes it even easier to keep your users informed while maintaining a consistent message. Status page templates…
Let's Encrypt DST Root CA X3 certificate set to expire
If you've been using Let's Encrypt for a while, you may have noticed that their certificates are signed by a root certificate titled DST Root CA X3. That root certificate is set to expire in a few hours. Any certificates still signed by that root will no longer be valid. But luckily, that shouldn't…
How Oh Dear identified a certificate problem at a large CDN provider
As part of our service, we perform SSL certificate monitoring. We do this slightly different than other providers, which is why were able to detect a problem with the SSL certificates of a large, commercial, CDN provider. In this post, we'll do a technical deep-dive into how we found this problem!…
Finding clients hit by Let's Encrypt mass-revocation
Yesterday, we sent out notifications to all clients whose certificates we continuously monitor and that are affected by the Let's Encrypt mass revocation of SSL certificates. In this post, we'll share the details how we found those certificates. Now, the morning after, we're well rested and in good…
Why agency Marbles chose Oh Dear for uptime monitoring
We reached out to one of our earliest customers, Marbles, to ask why they decided to move from Pingdom and use our service instead. If you're in doubt whether or not to give us a try, maybe they can convince you. Our interview with Marbles # Hi Rias, who are you and what does your business do? We…
