Sharing 3G USB Modem Broadband Internet

The story :

My friend Liew has 3 PC and wish to have Internet sharing using Celcom 3G USB modem. She already has local area network connection for the 3 PC using a switch and CAT5 cable.

What I did :

Setting up the host PC :

1. Install the USB modem and driver on the host PC
2. Make sure the host PC can connect to Internet with the USB modem
3. Open 'Network properties' of the USB Modem
4. Go to 'Sharing' column 
5. Choose 'Allow other network users to connect through this computer's Internet connection'
6. Choose the type of network you are using to connect the PC. I choose 'Local Area Connection'.
7. Choose 'Establish a dial-up connection whenever a computer on my network attempts to access the Internet'. (picture above)
8. Open Local Area Connection, choose Networking - TCPIP (Version 4)
9. Change the IP address of the host computer to 192.168.0.1, subnet mask to 255.255.255.0. Also key in the DNS of your Internet service provider. 
10. Click OK when done. 
11. Host PC all done. (Refer to picture below)
12. Do not change the USB port where you connect the USB modem or else the settings might not work next time.

Setting up the client PC

1. Go to Network Connection -  choose Local Area Connection
2. Choose TCP/IP (Version 4)
3. Key in TCP/IP of the PC - 192.168.1.25 (192.168.0.2 to 192.168.0.254)
4. Subnet mask - 255.255.255.0 , Gateway - 192.168.0.1 , Primary DNS - your ISP DNS, Secondary DNS : 192.168.0.1
5. Click OK. (refer to picture below)
6. You can use the same setting for other client PC but change the IP address from 192.168.0.25 to 192.168.0.26 etc.
7. Restart all the PC
8. The next time any PC open a browser, your host PC will connect to Internet and all the client PCs will be able to surf the Internet.

Additional notes :

• I would prefer you subscribe to wireless 3G service where the provide wifi router instead of USB modem to make life easier for you. You may bypass having setup wired network for sharing to work.
• USB Modem sharing can be done using wireless network as long as you have all you PC (host and client) connected.
• If you have a DHCP server in your network, you may need to set the DHCP server to use the host PC IP address as Internet Gateway.