Hm, I bought this software without reading any reviews, comments or something.
Making Lighthouse work with Linksys routers requires to turn on RIP-Support within the router (this enables Lighthouse to successfully connect to the router). But any profile I tried to apply just fails (UPnP and NAT are enabled, besides RIP.
I did not mail the developer about this, so it's maybe unfair, but it seems to me that it's (a lot) easier to set up a static port forwarding, than making Lighthouse work with your router. It's a pitty, since I really love the idea of the app.