I have many resources that explain how to send SMS through a web service etc but I cannot find a resource that allows to send through a GSM device plugged in the back of the monitoring server. Does anyone have any experience with this and any guidelines on how to implement it?
It has been a while since i used a GSM device to send notification alerts, most places now use external services for that and that is why you are hard pressed to do that.
That being said, when I did manage my own GSM device we connected to it via Kannel .
I can not help you in the implementation as it has been more then 10 years since i last did that, but you should be able get guides that details how it used to work with the N monitoring tool, and adapt that for your current use.*
there’s various devices which can be used here. In the past, there was Multitech iSMS where one could use these scripts. AFAIK this has been replaced/integrated into Braintowers new product line with the Gateways series. Other hardware vendors include SMSEagle for instance.
For native GSM modems, there’s SMS Tools 3 which can be run on your monitoring instance with adjusted notification commands. Here’s an old example.
Do yourself a favor and invest into a braintower gateway, if you can.
We also had a GSM Device in the past, which broke very often. We switched to braintower and migrated it into our icinga cluster. Works like a charm