Forum Discussion

Kirby_Timm's avatar
Kirby_Timm
10 months ago

Programmatic Ping Alert

We currently lack the ability to white list domain names on our firewall, so I have to do everything via IP.  Recently I’ve come across an issue where a company won’t give me their external IP’s beca...
alerts
ping
  • Anonymous's avatar
    Anonymous
    10 months ago

    plug-n-play, not likely for this use case. 

    It seems like you need to monitor the DNS resolution and update your synthetic check based on the IP that the DNS resolves to. Does that about sum it up?

    If so, this is definitely not going to be something that’s just plug-n-play. You’ll need to write a microservice to monitor the DNS and whenever the resolved IP address changes, hit the LM API to patch the synthetic check to update the IP address. All of this is doable, but depending on your level of comfort, you may want to pursue other avenues (start preaching the we-need-to-be-able-to-whitelist-domains argument).

Cole_McDonald's avatar
Cole_McDonald
Icon for Professor rankProfessor
3 months ago

Kirby_Timm   Most functional programming isn't much more complicated than that.  data in... evaluate... do something with it... data out.  I have a post here from a couple of months ago that addresses learning Powershell... but the five elements in the articles are universal to everything from Assembly through to Applescript.  Input (get or ##LM Properties##), output (write or print), storage (variables), loops (for, foreach, while), decisions (if... then)... everything else is fluff and you won't tend to use it for 90% of what you need to write... and you won't need to use all five for that 90% either.

For this one, setting a property with the expected address space can be pulled into the script using the property variables ##property.name.here##.  In a dataSource, that can be compared against the  returned address... and if it matches, return a 1... if not, a 0.  That can then be set as a threshold to raise an alert.

Or... in a configSource, the change is a built in alert evaluation.  Have the 'Source grab the info, then write it as the text/string output for the config.