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Re: NH1005 network hub
I assume that besides the 2 computers you also have a cable or dsl modem connected to the hub in order to provide the actual connection to the internet.
The problem may be the fact that this is a hub and not a router or gateway. The problem is that although it will allow you connect more than 1 computer to the internet, it does not do any good if you Internet Service Provider only supplies you with 1 IP address. You need something that handles Network Address Translation (NAT), like a router or gateway device.
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A "hub" just "splits" the Internet connection.
Each computer connected to the hub gets an IP-address from your ISP (Internet Service Provider).
However, some ISPs only allow each customer to use _one_ IP-address.
Ask your ISP for the capability to obtain a second IP-address.
A router takes an Internet connection, routes it to several other computers and provides each of these computers with their own IP address.
A Hub, on the other hand, will split the Internet, but the various ports on the hub will all have a single IP address. Makes it hard to use a computer for much of anything, if it is the second computer, you'll have trouble getting access.
first make sure that you are getting lights on all of the devices at the hub, and also that all four are getting ip addresses. if the 4th device is not getting an ip address but does show connected to the hub, then the problem is more than likely your router is not serving enough ip's for all of your devices. also make sure that everyone of the devices are not assigning a static ip that could possibly knock out one of your devices, or if they are all static ips, that one of them is not set to the same ip as another.
I recommend purchasing a small switch because what it sounds like is that the traffic being generated from and to the two computers and then out to the Internet is killing your hub. A switch would help reduce some of the traffic.
Are you working with a router or a hub...there's a big difference in how they work. The heading above your post says LinkSys NH1005 Networking hub, but your post refers to a Router.(?) Can you provide the exact brand and model number from the device?
A router can support several devices and allow them to share a single IP address on the Internet. Router setup is usually automatic, but there are several settings that can be adjusted manually if it doesn't work right. If this is a hub, the ability to assign addresses to more than one device at a time will have to be set up by your ISP on the cable modem.
Your description of the problem sounds like you may be working with a hub, and the cable modem isn't supporting connection of more than one device at a time to the Internet. If that is the case, you will need to contact your cable provider to see if they can support more than one network device using a hub. If not, you will need to upgrade to a router.