How to Share Internet Between Two Computers Using WiFi or LAN
Sharing internet connection between two or more computers has become a common task in both professional and personal settings. This can be done through various methods including WiFi and LAN (Local Area Network). In this article, we explore the steps to share an internet connection using both methods and some advanced configurations such as setting up a NAT and DHCP server.
Connecting Computers via WiFi
One of the most straightforward methods to share internet is through WiFi. Here are the steps to follow:
Ensure that your internet modem/router is connected to the internet provided by your ISP (Internet Service Provider).
One computer should be connected to the router via WiFi. On this computer, go to the network settings and note down the network name (SSID) and password.
On the second computer, create a new WiFi network profile using the information from the first computer’s network settings. Connect this computer to the network.
Both computers should now be connected to the same internet connection. You can verify this by checking the internet connectivity on both devices.
Connecting Computers via LAN Cable
Using a LAN cable is another effective way to share an internet connection between two computers. Here’s how to do it:
Ensure your internet modem/router is connected to your ISP. The modem should have a LAN port for the router.
Connect one end of the crossover or straight-through Ethernet cable to the LAN port of the router and the other end to a LAN port on one of the computers.
Connect a second Ethernet cable to the LAN port on the other computer and to a LAN port on the router.
Ensure both computers are connected to the same network and internet should be shared.
Advanced Configuration: Setting Up NAT and DHCP Server
For more advanced users, setting up a NAT (Network Address Translation) and DHCP (Dynamic Host Configuration Protocol) server on one of the computers can further enhance the sharing experience:
On the computer that will act as the NAT and DHCP server, install a network management tool (e.g., Awvs Toolbox) or use the existing functionality in the operating system settings.
Set the computer’s network interface to be a DHCP server for the private network range, for example, 192.168.100.1/24. Set the gateway and DNS server in the router settings to the computer acting as the DHCP server.
Connect the other computer to the same network as the NAT/DHCP server. Assign a static IP address in the same range for the second computer, such as 192.168.100.2/24.
Ensure the firewall is configured to allow outgoing internet traffic for the second computer by running the following commands (cipher: replace with your network configuration):
firewall-cmd --add-masquerade firewall-cmd --reload
Conclusion
Sharing internet between two computers can be done through simple methods like WiFi or LAN cables. For advanced users, setting up a NAT and DHCP server can provide a more robust solution. This guide covers the essential steps to ensure seamless internet sharing and can be enhanced based on individual needs.
FAQs
Can I share an internet connection between three or more computers?
Yes, the same principles can be applied to additional computers. Each additional computer would need to be connected to the main computer or the router via the appropriate method (WiFi, LAN, or advanced configurations).
What if my internet connection is slow or unstable?
Ensure your internet modem/router is properly configured and that the connection is stable. Also, check for any network congestion or interference. If necessary, contact your ISP for further assistance.