[URL]http://www.dlink.com/de/de/home-solutions/connect/routers/dir-645-wireless-n-home-router-1000[/URL] If I do not connect a pure modem to this router, I can not use the DHCP function of this Router. I must use the old routing interface of the Modem(with router called modem in the following) instead of the interface of the DIR 645 The modem is connected with the DIR 645 at a lna port Whe I turn on the routing of the DIR 645 and turn of teh Routing of the modem(router) I must choose a internet connection I have Static IP Dynamic IP (DHCP) PPPO PPTP L2TP DS-Lite I am using Static IP DIR 645 Router z.B 192.168.1.1 Internet static IP at DIR 645: Static IP 192.168.0.1 the modem Default Gateaway 192.168.0.2 (I can not use 192.168.0.1 which is the gatway) I must choose a different Gateway as the internet static IP but in this case gateway and IP is the same so I have to configure the clients by hand without DHCP Subnet 255.255.0.0 Gateway and DNS Server 196.168.0.1 What else can I do. it difficult to find a DSL MODEM (ANNEX B ADSL2+) without router Kind regards Knut