Add my Mac as a Jenkins Node

I have a Jenkins instance running on AWS and a Mac mini running on my local network (dynamic IP). I need to add my local mac as a node in jenkins to be able to compile iOS apps. This is achieved through ssh. So what I REALLY need is to start an ssh demon on my Mac, run a ddns software, configure port forwarding on my ISP's router and add my mac as a node in Jenkins. Challenges: Port 22 may be blocked by my ISP and the ddns host may also need port forwardin configuration.