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If you can’t connect wirelessly to the Internet, this could be a useful checklist:




Internet Connection Fault (Quick List)


1) Check task bar Internet icon for connection status, left-click for connect options.

2) Open Network and Sharing Center - check "Network Diagram", "Manage Wireless Networks", and "Change Adapter Settings".

3) Disable firewalls. Try to connect via Ethernet cable.

4) Open router/gateway settings access page to check settings.

5) Use IP diagnostics tool set or contact ISP support.




Internet Connection Fault (Full List)


If you find your Internet connection isn't working:


1) Check your task bar Internet icon. If the sunshine symbol is showing, your PC is picking up available networks with sufficient signal power but you are not connected. Left-click the icon left-click the network that you want to connect to (home network) click connect. If you now have access to the Internet, you need to set the auto-connect preference for this network on your PC (see 5). If it does not let you connect, check that you have the correct wireless key set for this network (see 5). If no access points are listed or the Internet icon has a red cross, your wireless adapter may be disabled (see 6), or your WiFi dongle not plugged properly. If your router is not listed but other access points are, your router is not transmitting - Turn off your PC and router, wait about 15 seconds, turn on router, when all the active/ready lights are on, turn on your pc and try again.

2) Alternatively, if your router is listed and you seem to have a connection, try another website (e.g. Google, Amazon) to see if it's a problem with the site you're trying to connect to. If still not working...


3) Open Windows "Network and Sharing Center" (Control PanelNetwork and Internet, or right-click the Internet icon on your task bar). At the top of the window should be a "Network Diagram" of your local network connection to the Internet. If Windows picks up a fault somewhere it will show a red cross on one of the connections. If there is no red cross, click on the Internet globe symbol, Windows will try to open your Internet explorer home page. If there is a red cross at some point, you can try the "Troubleshoot Problems" tool, but this often won't find the problem. If still not working, time to get serious...

4) If your router/home hub doesn't appear in the Windows Network Diagram, go to 5. If it does appear, in theory you're pc and router should be talking to each other, go to 9.


5) If you think they may have somehow changed since you could last connect to the Internet, check your Wireless Settings (if connecting wirelessly) and Firewall. In the Network and Sharing Center, click on "Manage Wireless Networks", then double-click your home network/network you want to connect to. In the "Connection" tab check "Connect automatically when this network is in range" is ticked. In the "Security" tab check that your correct "Network/Wireless Security key" is entered. Press OK. (if you have more advanced details about your router you may want to check the other security settings). Try to connect to the Internet again.

6) In the Network and Sharing Center, click on "Change Adapter Settings", right-click on the "Wireless Network Connection" icon, and check it is enabled. If it is, click on "Properties" and check your wireless adapter is selected in the "Connect Using" box, then select "Configure" to check its working status and driver details. If the "Wireless Network Connection" icon is not listed, your PC is not picking up your wireless network card/adapter/driver. Open Windows Device Manager (Control PanelHardware and Sound), under Network Adapters, check that your 802.11 adapter is listed and enabled, double-click the adapter to check its status and driver details. If it is not listed or working properly, you may have to update driver or visit PC mechanic.

7) If the router still doesn't appear, try turning off your firewalls (Control PanelSystem and SecurityWindows FirewallTurn Windows Firewall On/Offunder the Home Network sectionTurn Off  Windows FirewallOk). If you have another firewall, also turn that off. Try to connect again (if can now connect, you will have to change your advanced firewall settings, if not the problem remember to turn them back on again!).

8) If still not working, as a last resort, if you are connecting wirelessly, try connecting to your router using an Ethernet cable (or vice versa). If you can now connect, open your router device access page (see 10), and check that your PC wireless settings (see 5) match the router settings, if they match, try rescanning for a new wireless channel if the option is available in the router WiFi settings.


9) In the Windows Network Diagram, left-click on the router symbol. In the device list that appears, right-click "Properties" on your router. This should list your router Physical (MAC) and IP addresses, and therefore show that your PC network card can see/talk to your router.

10) Then on the router symbol again, right-click"View Device Web Page" to open your routers on board settings and configuration page in a browser. You will need your router admin password (should have been supplied when you received the router). Have a look to see if there is anything obvious (e.g. power saving modes turning off WiFi at certain times, or access denied to particular PC's, it may even offer a diagnostics status page). Note: You should favourite this page in your Internet browser, or take a note of the IP address so you can get quick access to it's settings and check you can connect to your router at any time.


11) If the above doesn't get your connection working. If your PC is talking to your router, it may be a service provider network problem, you can always make some checks using the tools below. Otherwise, best to phone service provider support.




IP Diagnostics


1) Use Adapter Watch / Karens LAN Monitor to get your PC's IP and MAC addresses, it should also list your router/gateway/home hub IP address. Your router/home gateway/hub will also be listed as your DNS (Domain Name Server), as the router will then forward DNS requests to a local ISP (Internet Service Provider) defined DNS somewhere on their network. DNS: When you enter a website name (URL - Universal Resource Locator - e.g. www.amazon.co.uk), a request is first forwarded to your ISPs local DNS server. This server then returns the IP address for this website (e.g. 178.236.6.39), it is this address that your browser and the internet use to send your page request across the internet to the requested website.


2) Use Ping Easy to ping your router/home gateway using it's IP address. The "sent" row tells you how many ping messages were sent to it, the "received" row says how many responses were received back from this address by your pc, the "lost" row shows how many of the pings received no reply. If all lost, your router is not responding. You can also use Ping Easy to ping any IP address on the internet.


3) Use Ping Plotter to get a list of routes to your usual/major internet sites (e.g. Google, Hotmail, BBC, Amazon etc) while your internet connection is working. Enter the website URL or IP address in the "Address to Trace" box, then click the "Trace" button at the bottom of the window. Ping Plotter should then list the IP addresses of all intermediate routers along the path to the requested site, and their registered DNS names. FileExport to Text File the results and save for future reference. In future, if you can't access the Internet, you can use Ping Plotter or Easy Ping and enter any of the IP addresses you have saved to analyse how the Internet is responding.





Network Diagnostics


1) NIC Setup - Use Adapter Watch to get own NIC IP, MAC, DNS, gateway IP, and other settings.

2) NIC Ports - Use Current Ports to get all open/active TCP/UDP ports and IP connections.

3) LAN Scan - Use Advanced Port Scanner to get list of all active devices and ports on your LAN.

4) LAN Scan - Use Newt Pro to get full inventory of devices on your LAN (need to set access on devices).

5) WiFi Scan - Use Wireless Net View to scan WiFi channels for available access points and devices.

6) Gateway - Use Internet Browser to access internet gateway router settings pages.

7) Internet - Use Internet Browser to get your DNS IP address.

8) Internet - Use IP Tools to get any Internet IP data using Ping, Trace Route, and Who Is.

9) Internet - Use Ping Plotter to get a graph of hop response times to a given IP address.

10) Traffic Analysis - Use Wire Shark to capture and analyse all NIC traffic packets.




IP addresses


Your PC : xxx.xxx.xxx.xxx

Your router:  xxx.xxx.xxx.xxx

Service Provider Access Point: xxx.xxx.xxx.xxx

Service Provider Hop 1:  —.—.—.—

Service Provider Hop 2:  —.—.—.—

- - -

Service Provider Main  Switch:  xxx.xxx.xxx.xxx  (main switch from your address, after this traffic paths diverge)

Service Provider Hop x:  —.—.—.—

- - -

www.google.co.uk:    74.125.132.94

www.hotmail.co.uk:   94.245.116.9

www.yahoo.com:       87.248.112.181

www.amazon.co.uk:  178.236.6.39

www.bbc.co.uk:        212.58.244.66

www.guardian.co.uk: 77.91.248.30

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