First of all I want to say sorry about my mistakes you will find in my text. My mother language is German and I'm not perfect in English. I'm not talking anymore because you want the link with all the commands. So just go to this link ELK + Pfsense and you will see my tutorial. Please read the whole text and make sure you have the same requirements.
I will be on holiday for the next 2 weeks so I will reply but maybe not so fast. If you have question go to the contact form of this website and then you can contact me. Please let me know if you find mistakes.
Thank you for your understanding.