哪家 ISP 這麼鳥, 還要先登記 MAC Address? ADSL Modem 是 D-Link DSL-300G, 有沒有把 ADSL idle time 設為 0 (alwaya on) 因為接router 就會 30 分鐘斷線, 這聽起來就像是 ISP 為 PPPoE 預設的斷線時間.

OH! 把 DSL-300G 的 PPPoE, router ... 進階功能關掉, 讓它成為一台單純的 ADSL modem, 這樣接在後面的 router 才能控制 PPPoE 撥號, NAT ... 功能. 所以去找一台單純的 ADSL modem 來接 router 才是對的.

另外一點值得注意, DSL-300G 已經停止技術支援, 你有更新韌體嗎? 也許韌體是舊版(有問題)的作業系統, 更新到最新版以後說不定會變好.

http://www.support.dlink.com/produc...ductid=DSL-300G

Sorry, this product has been discontinued and is no longer supported by D-Link tech support. However, as a courtesy to our customers we will continue to provide the resources that are available on this page.

The D-Link DSL-300 is an external ADSL modem that provides a single 10Mbps Ethernet port. With a windows based configuration tool, the DSL-300 allows users to easily modify settings to connect via G.lite or G.dmt ADSL depending on their DSL provider. The DSL-300 is capable of providing high speed Internet access and/or remote connection to an office LAN.