IP address problems?

Question

I had to have my son's computer cleared out professionally since it had too many viruses to repair. When we pluged in the router and tried to get internet service again, it says we have no IP address. I have tried to "repair" to see if it could get the connection, but it has failed. It was working fine before we cleaned it up. Any help?

Answer 1

I am going to assume that other pcs on your Local Area Network (LAN) are properly working and rule out a problem with the ISP service, the modem, and the Internet feed. If this has not been ruled out be sure to do so.

I am also going to assume that your router is providing LAN IP addresses via Dynamic Host Configuration Protocol (DHCP).  [If this is not the case, and you have no other DHCP server, you must assign a static LAN IP to your pc and it must be unique and in the same subnet as the router LAN port. ]

Having said the above, your pc's LAN port must be set to obtain IP address automatically and to obtain DNS automatically.

Click on Start, Right click on My Network Connections, click on Properties.  Mouse over to your network connection and right click on it and then click on Properties.  On the pop up window, on the General Tab, highlight Internet Properties (TCP/IP) and click on the Properties button just below.  You will see another pop up where you select the Obtain IP address automatically and obtain DNS Servers automatically - be sure to select both properly, click apply and exit this.  Now you should be able to obtain an IP address and all should work.  If it does not, reboot pc and router.  If it does not, then go back to check router DHCP settings.

I am assuming this is a wired link to the router; if it is a wireless link, you must configure the wireless port to match the configuration for wireless in the router.

Answer 2

Click on Start, Right click on My Network Connections, click on Properties. Mouse over to your network connection and right click on it and then click on Properties. On the pop up window, on the General Tab, highlight Internet Properties (TCP/IP) and click on the Properties button just below. You will see another pop up where you select the Obtain IP address automatically and obtain DNS Servers automatically - be sure to select both properly, click apply and exit this. Now you should be able to obtain an IP address and all should work. If it does not, reboot pc and router. If it does not, then go back to check router DHCP settings.

I am assuming this is a wired link to the router; if it is a wireless link, you must configure the wireless port to match the configuration for wireless in the router.

Answer 3

Is the interface set to use DHCP? check the properties.

Answer 4

You need to configure the router to hand out ip addresses to its client computers, either through DHCP or using a static ip.

Answer 5

Try to get in to your router make sure it is not blocking his computer, but that's probably not the problem, but it might be a good idea and try resetting the router just in case.

Step 1

Go in to my network places and find the network you made, even if its not connected. right click on it and select properties. It should have a scroll down list on the new window, in it find Internet Protocol click on it then click properties. Make sure that in both boxes the bubble is marked to obtain the IP and DNS automatically. Now try to connect to the router, if it doesn't work go on to step 2.

Step 2

go in to run program and type "cmd" (all of these are without quotes) and run it.

now type "ipconfig/all" then click enter look for his IP address, it should be clear or all 0's, if its not type "ipconfig/release" click enter then wait, after its cleared type "ipconfig/renew". that should ask for a new IP from your router. try to connect to the network.

Answer 6

Window$?

Check your firewall to see if it is enabled.

Start > Run - type in 'CMD'

type in 'ipconfig /all'

Do you see an ip address of 192.168.x.x? or is it 169.254.x.x? (APIPA address hiccup)

Try 'ipconfig /release' then 'ipconfig /renew'

Try pinging the router 192.168.0.1 or whatever the config page is for your router (should be in the documentation or a sticker on the bottom of it...)

If you get a reply from your router, try pinging a web host.

Good luck!