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We have had an outage for classic measurements that are assigned to the “World” zone. Non-classic and classic sensors assigned to either US or EU or AP were not affected (cf. below).   The problem has been identified and new results are expected to come in, soon.

Measurement Server Update: Firefox

Wednesday, 26 November 2014 by

Starting today, we will update our measurement servers’ software stack to feature Firefox 33.1.1 and iMacros for Firefox 8.8.7 (as available on This update is transparent and does not require users to take any further action.

As you may already know, we had trouble with our database’s harddrives on Nov. 14 (cf. our tweets). We were able to apply a hot fix then, but now we want to make sure that similar incidents will not occur in the future. The implementation of our solution will require another downtime of approx. 30

We have released iDrone 2.12. The iDrone is a free virtual appliance that allows you to monitor services that are behind the firewall, for example your local Sharepoint, Jira or SAP installation. Here’s what’s new with V2.12: Updated software stack (iMacros, Firefox, iMacros for Firefox) Multiple changes to enhance the configuration wizard Support for clean

Some of our customers need or want to white-list our measurement servers’ IP addresses. So here’s three more of them: The complete and updated list can be found here.

Starting early next week, we will update our measurement servers’ software stack: iMacros 10.0.2 Firefox 31 iMacros for Firefox 8.8.3 Adobe Flash Oracle Java No action is required from our customers. [Update 2014-09-04] Server update completed.

As announced via Twitter [1, 2], there was a partial outage wrt. our monitoring/alerting services during yesterday early morning (GMT). Here’s more information: What was affected during the outage? Classic sensors’ results were lost during the incident. Notifications were not triggered until after the incident was corrected. iMacros sensor’s results were not immediately stored during

If you are as enthusiastic about computers as we at AlertFox are, you probably know the Raspberry Pi. And if you are as interested in web sites as we at AlertFox are, you probably know WordPress. Now, what would you do if you wanted to host a blog for very little money? Right! You’d run

Measurement Server Software Update

Thursday, 03 July 2014 by

We are about to update our measurement servers. Here’s the new line-up: iMacros 10.00.2738 iMacros “plugin” for Internet Explorer Firefox 29 iMacros for Firefox 8.8.1 Flash Java 7 Update 55 Silverlight 5.1.30214.0 There’s nothing to do on your side. However, if you think you are negatively affected, please contact support.   [Update] All

US/EU Round-Robin Retries

Tuesday, 06 May 2014 by

Many of our users appreciate that we have a shared US/EU zone for transaction sensors. Some, however, told us that while a random distribution across the US and EU measurement servers is fine for making sure that customers on both sides of the Atlantic can indeed use their web app or site, it did not