Routeur is WRT54G I tried with both WifiBox and Sveasoft firmware (need Static DHCP), and in both case I get the same behaviour: The dyndns update client is able to update the correct IP when I do it manually from http://192.168.1.1/DDNS.asp However after a few hours, the updated IP used by the client changes. I.e. it updates on a wrong IP whereas my IP did not change at all! Still, the http://192.168.1.1/DDNS.asp page still shows the correct address. Any idea/solution regarding this topic? It really seems weird to me, and I've no idea where to look for.. :?