I have two computers connected to a router, they are all shared same internet connection. One day, router blocked the internet without a warning.
I tried to re-setup ICS Wizard in router, re-setup main network adapters in router and client computers.
Network Connections > right-clicked Local Area Connection, Properties > Internet Protocol > Properties, type in IP Address, Subnet Mask, Default Gateway. Note: only router had empty Default Gateway
FYI, Local Area Connection use local IP address, its Subnet Mask and local Default Gateway. You can use range 192.168.0.1 – 192.168.0.255 or 192.168.1.1-192.168.1.255.
Microsoft Documentations tell you to use range 192.168.0.1 – 192.168.0.255, because ICS Wizard likely to setup that range.
You can read how to setup ICS or in our own short term, Internet Sharing here. My experience below could be used for both range of IPs
I won’t explain ICS Wizard again, because that isn’t subject of the article. This article for you who have problems with Internet Sharing
Re-setup didn’t help. I concluded it could be something unrelated with Network that blocked the internet sharing, virus or worm?. I scanned all three computers using Avira AntiVir Personal. No virus or worm found in scan results. Then I realized the Avira would have expired. I removed Avira from all computers. Of course, before you removed Avira, you should check quarantine folder, because few anti-virus could release them. Delete whatever in quarantine folder
I also did reset IE, Internet Explorer controlled Internet Online/Offline behavior when no setup proxy in Firefox, Chrome, Opera or other browsers, even Yahoo Messenger affected by IE. Go to Tools on Menu bar > Internet Options > Advanced > Reset Internet Explorer Settings > Reset, follow instructions on the screen
Next, I ran a set of commands to clear and flush WinSock (run this on router and clients),
netsh winsock reset
netsh int ip reset reset.log
netsh winsock reset catalog
ipconfig /flushdns
ipconfig /renew
Press enter after each command.
Reboot the computers and see that makes a difference, you still see the problem then it could either be a corrupt registry file or firewall problem (If that’s registry, re-install Win XP. If that’s firewall, disable WinXP firewall)
After reboot, i had to setup router and client computers IP Addresses, Subnet Masks and Default Gateways. Default Gateway IP in clients must use Router IP Address (router doesn’t have Default Gateway)
Now, last but important setup DNS to router IP Address
After everything okay, you can install Avira back again
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