@Russ Thank you so much. You are my hero! I have been wanting to link those two systems for ages and I finally got it. I'll also be creating a tutorial on Zoneminder forum on how to go through all the steps and do what I did and I'll be linking to a few different parts of the forum for reference. Hopefully bring more attention to such an awesome system that you have created. I believe TriggerCMD and Zoneminder can be friends and help each other out.

@Russ Thanks for your reply. I saw the command but I guess my problem is, I don't know what to do with it. (I don't know how to code and currently trying to learn Linux, I'm a network guy) I figured I would have to write like a short bash script to open telnet and pass that string to the telnet session. And then setup triggerCMD to run the bash scrip when triggered via Smartthings. Am I thinking of this correct or is there an easier way to open telnet and pass info to it via triggerCMD?

Is it possible to send telnet commands via TRIGGERcmd from local Linux machine to somewhere on the LAN? I am trying to integrate Smartthings and ZoneMinder. Basically when a contract sensor is open (front door), to send a command to ZoneMinder to start a camera recording that is facing the door. Zoneminder can receive commands via telnet. But I'm having a hard time finding anything that integrates with with Smartthings and able to communicate via telnet to link both systems together. Smartthings does not communicate over telnet (wouldn't that be awesome). And other cloud services like IFTTT, do not support it either. Plus I didn't want to open a telnet port into my network from outside, that's just asking for someone to "walk in". TRIGGERcmd seems like a perfect solution, if it supports telnet. Zoneminder has a wiki explaining how it is able to receive triggers here but basically send a telnet session to a specific ipaddress and port, and after that a string of text.