The cool thing about these routers is that they have built-in DynDNS support. (If you don’t know what it is, Wikipedia has a good article about it). What it basically does is pointing a host name to a dynamic IP address. ISP’s don’t like this, but you’re doing nothing wrong with it.
With the router in place, my network is secured and I’ve added some port forwards to my Centos server.
I’ve added some accounts for some of my friends and opened SSH for them through the internet. Succes!