FRITZ!Box is manufactured by AVM. Founded in Berlin in 1986, AVM has become one of the leading home networking manufacturers in Germany with it's FRITZ!Box series being very popular.
These are our FRITZ!Box port forwarding guides below. Simply select the router model from our list. If you don't see your exact model listed here, we recommend finding one that seems similar. The FRITZ!Box routers have a very similar interface. If you find a similar guide it will probably work just fine to get your ports open.