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I'm using an Internet Provider that requires a username and password to log in; the prompt shows up as soon as you open a web browser. Because of this, I can only have one device online at a time. How can I get my Time Capsule to essentially log in as the user and allow other devices to connect through it. My Time Capsule has worked with other ISPs that don't require the user log in, but I recently moved. I may be wrong about how the ISP is allowing access, I wasn't sure how to describe the problem. Thanks.

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I am not sure I understand -- Is the issue that you can connect only one specific device (with a MAC address registered at the ISP, some ISPs do that, it's mostly hassle for users and money making mechanism for ISPs) or any, but just one device at a time, as you said? If any, but just one, try Spiff's answer. If one specific -- get a router that supports MAC address cloning and connect everything, including the Time Capsule to it. Many routers support this, but Time Capsule doesn't. – lupincho Apr 12 '12 at 5:46

Turn on NAT ("Share a single IP address"). That way only your Time Capsule's MAC address will be seen by the ISP. Then whenever you need to authenticate via the web page, it doesn't matter which machine on your home LAN/WLAN authenticates, that authentication transaction will appear to come from the MAC address of your Time Capsule.

If turning on NAT doesn't help, then your ISP is doing something other than just looking at the MAC address.

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