Additional functionality (print server, port forwarding, etc.) I have not tried, I would be happy if the standard functions would run reasonably stable. If you change the way the IP address and, accordingly, the DHCP address pool of the router, he denied altogether the service, the Internet access is no longer possible.
Conclusion: The current firmware is from October 2010, it is therefore unlikely that it already Allnet nachbessert, therefore, prefer to steer clear of this unit. I myself have unfortunately taken it only 3 weeks after delivery in continuous operation, otherwise I would have returned it immediately.