Why aren't my routers working?

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I'm not really an expert with computers and stuff but I think I know a bit more about it than the average person. But I've been having a really weird problem which I don't understand.

So I rent a student room from a corporation and get an ethernet cable to use for internet. I just put it in a router

I'm not really an expert with computers and stuff but I think I know a bit more about it than the average person. But I've been having a really weird problem which I don't understand.

So I rent a student room from a corporation and get an ethernet cable to use for internet. I just put it in a router so I can have wi-fi in my room. But recently my router started acting up. Sometimes it would not work and when I restarted it, it would work for about 10 seconds and then stop working. After a while it stopped working at all. So I thought it's a problem with my router and bought a new one. But when I put the cable in my new router it still doesn't work. It creates a network but when you connect to it there's no internet. However, when I put the cable directly into my computer it works fine.

So this just really confused me. Because I bought the router just new so I'd expect it to work. So I'm wondering now, is there any possibility that there's something wrong with my ethernet cable or whatever that it doesn't work in routers? It seems very unlikely to me, but I just want to make sure before buying another router.

Other answer:

ruben.devries96:
Normally, in the situation you describe just connecting the router's WAN Ethernet port to the incoming Ethernet should be sufficient. I assume you are using the WAN port, and not one of the PC/LAN ports. If the router does not have an Ethernet WAN/Internet port then it is the wrong type of router.

The normal gotcha when connecting a router like this is a clash of subnets. You have to make sure that the subnet being provided on the incoming Ethernet cable is different from the subnet being used by the router for its local network. If the subnets are the same, the router can get confused over where packets should be routed – should they go over the WAN port or out on your local private network. Also, the router can potentially assign the same address to one of your devices as has been assigned to the router for its connection to the incoming cable. It is also possible that the gateway address the cable provides is the same address as the router is providing as a gateway address to your devices.

Check what addresses the router assigns to your computer, and then check what addresses the incoming Ethernet provides to your computer when connected directly without the router. If they are using the same subnet, change the router's address to use a different subnet. Also check that the DHCP address pool is changed. Some routers will change the address pool automatically, while others require this to be configured separately.

Good luck.

Karen:
You should make sure that router is not trying to send a logon user name and password. You also need to ensure it has a proper WAN connection and that it does not require special protocols to connect.
flourny:
You should make sure that router is not trying to send a logon user name and password. You also need to ensure it has a proper WAN connection and that it does not require special protocols to connect.
wallace:
You should make sure that router is not trying to send a logon user name and password. You also need to ensure it has a proper WAN connection and that it does not require special protocols to connect.
Oliver:
You should make sure that router is not trying to send a logon user name and password. You also need to ensure it has a proper WAN connection and that it does not require special protocols to connect.
Thomas:
You should make sure that router is not trying to send a logon user name and password. You also need to ensure it has a proper WAN connection and that it does not require special protocols to connect.
Claire:
You should make sure that router is not trying to send a logon user name and password. You also need to ensure it has a proper WAN connection and that it does not require special protocols to connect.
Adrian:
Commercial firewalls have the ability to detect additional "routers" and disable the port. Companies do this to keep their network secure. They disable other routers because that then disables any open wifi or any wifi that can be used as an "open hole" into their network. Since companies are responsible, legally, for how their network is used to access the Internet, they can be very paranoid about how access to the network is controlled.

Thus I suspect they have locked down their network to dis-allow any additional routers, to prevent people like yourself from installing wifi over which the company has no control, and can be open to allow strangers into the company network.

Isaac:
You should make sure that router is not trying to send a logon user name and password. You also need to ensure it has a proper WAN connection and that it does not require special protocols to connect.
?:
You should make sure that router is not trying to send a logon user name and password. You also need to ensure it has a proper WAN connection and that it does not require special protocols to connect.

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