Ask HN: Website Monitoring Tool (Internal)

Hello,

I work for a Network Operations Centre for an insurance group and have been tasked with monitoring and alerting the status of a large number of websites, both external and internal. The issue I am having is finding an open source application that we can run from one of our application servers, so that we can use this to monitor our internal sites.

There are a number of paid service options, but these require a Firewall rule change for inbound traffic which is not currently possible from a security perspective.

Does anyone know of, or currently use any applications that would suit this?

We have looked at ServiceMon, which is excellent, except this will be displayed on an 8 screen wallboard and the management team were not a fan of the simple design. We have the option of the SolarWinds Web Monitoring package, but due to the price this will be a last resort.

Thanks.