need help? router or ISP?

[kanu_knl]

i have 4 comps and use wireless through a D-Link router. i can only connect to the internet for about 2-3 hours and then disconnect. I restart the router and the network work. but just only 2-3 hours again, it's off => can't connect. I try and I try and this cycle keeps going. Is this problem because of my router or my ISP( SBC Yahoo DSL)?
how can i fix it guys?
thank you

[YeOldeStonecat]

When your connection appears to drop...can you still connect to the web admin of your DLink router?

The modem that SBC shipped you..what make/model? Most of the new ones they ship you..are actually gateway appliances that combine a modem, with a router. A lot of people think they are just pure modems..meaning..bridge, and they add another router to them. This results in having two routers...you're double NAT'ing..which isn't optimal even if setup correctly.

[kanu_knl]

When your connection appears to drop...can you still connect to the web admin of your DLink router?

The modem that SBC shipped you..what make/model? Most of the new ones they ship you..are actually gateway appliances that combine a modem, with a router. A lot of people think they are just pure modems..meaning..bridge, and they add another router to them. This results in having two routers...you're double NAT'ing..which isn't optimal even if setup correctly.

Thank you YeOldeStonecat
I can't connect to the web admin of my DLink router when i plug my modem to my router and my router to my comp.
I receive the 401 Unauthorized
My modem model is SIEMENS SpeedStream 4100. Is it a combined modem?

[kanu_knl]

In the web admin of my modem, I found the PPP Locations. It has 3 choices and I am selecting the one that can use with a router. But it says that i should change my router's IP to 192.168.1.1.
My router's IP is 192.168.0.1 which is the same as the modem's IP.
What should i do?

[YeOldeStonecat]

Yah...the 4100 units usually come shipped running as a router. I'd flip it to bridged mode..use your DLink as your PPPoE source and router.

[kanu_knl]

Here was how I tried:
I unplugged the modem with the router, and plugged the modem to my comp. I went to PPP locations of my modem, change it to bridged mode, but after the modem restarted, I was not able to connect to the internet again.
I tried evry thing, I restarted the modem again but still no connection. I tried to change the PPP back to normal so i could use the router, but no hope :(.
Eventually, I used the DSL Installation CD to reinstall. Right now I am using the 1st mode in PPP with my router. Problem had not been solved :cry:
Yah...the 4100 units usually come shipped running as a router. I'd flip it to bridged mode..use your DLink as your PPPoE source and router.
What is PPPoE source and how to do it?