1. DHCP issue : A DHCP issue is the most likely reason why PC/laptops or other devices don't get Private IP address automatically from router or gateway which is configured as the DHCP server. DHCP or " Dynamic Host Configuration Protocol " Server on LAN automatically assign private IP addresses when a host comes online.
A step-by-step approach to deal with this :
- Restart your computer and Router/Gateway you use to connect to the internet.
- If the issue persists, then access your Router/Gateway configuration to confirm whether the DHCP server on it is enabled.It is most commonly found in LAN settings option in the Router/Gateway Management console.
- If the above two steps fail, enter manual private IP in TCP/IP settings of your Computer.
2. DNS issue : The DNS or Domain Name system is responsible for mapping domain name or URL we type on the browser's address bar to corresponding server's IP address.
To check whether DNS is working on your computer, open command prompt and type the command nslookup and hit enter.The result will show whether DNS is working on your system.
|System unable to connect to Primary Resolving DNS server|
|DNS server not connected|
Google Public DNS : 184.108.40.206 and 220.127.116.11
OpenDNS : 18.104.22.168 and 22.214.171.124
To resolve this, check whether your router's DNS settings is set to Automatic.If it doesn't work select the manual setting and enter the pubic or Open DNSs as given above.You may also update manual DNS settings in TCP/IP settings of your Computer.
|A system properly connected to DNS server|
3. Proxy settings in Internet browser : Disable any Proxy settings on your browser and restart your Computer for the changes to take effect.
4. Clear Browsing data : Some cookies or Temporary Internet files on your Computer may block loading of webpages partially or totally.Clear Browsing data (that includes Cookies, caches, Temporary Internet files, etc.) and restart your browser and see if it fixes the issue.
5. Issue with your PC's LAN or WiFi driver : To get started with testing your LAN or WiFi adapter, first make sure that its Status is Connected (to the Router/Gateway).If it is showing Unidentified Network or Limited or No Connectivity, follow step #1.
Once it is showing connected, open Command prompt and ping the Router IP, if your computer is connected to the Router/Gateway, ping Reply will come from Router.Make sure you know the Router IP.
|Successful Ping statistics to Router IP : 192.168.1.1|
If you don't get a reply, then the best way to determine whether there are issues with your computer's LAN or WiFi is to check the same with a different computer.If you get the ping from your router after connecting another computer using the same LAN cable or WiFi, then issue is definitely with your former Computer's LAN / WiFi adapter. Try re-installing the correct version of LAN/WiFi drivers compatible with your Computer's OS.If it doesn't work, it is time to call your hardware technician for checking LAN/WLAN adapter hardware issues.
6. Issue with Router or Access point : Power cycling( i.e. powering OFF and the put ON again) the Router or Access point is the most common solution as the hardware may hang due to prolonged use or any other unidentified reason.If this fails, then it may be required to be reset and reconfigured.
7. Corrupt TCP/IP protocol stack : To recover a corrupt TCP/IP protocol stack, go to Command prompt and type the following then hit enter :
netsh int ip reset8. Incorrect firewall / antivirus settings : A fresh antivirus/ Firewall install or an update may stall your internet connection.Sometimes multiple antivirus / firewall products have conflicting behaviour, so try to have a single comprehensive product or you have to tweak with the settings of individual products.Also you may lower the security settings of your antivirus/ firewall or even disable it for sometime to check whether it is really the culprit.
9. Malware / virus : Install a a good Total Internet Security Suite in your system, keep it updated and run regular scans to avoid any malware mischiefs.
10. Issue with the Browser : If steps #3 and #4 have failed to restore your browser to normal operations, chances are some settings/files of the browser have gone corrupt.You could then Reset the Browser to Default Settings.If still no result, try with a different browser or uninstall and re-install your current browser.