Computer dual network card internet settings: Fixed IP Address for the Internal Network, Automatic IP Acquisition for the External Network, and you also need to add a static route using CMD commands.
Method for Setting up both Internal and External Networks Simultaneously
The following is an example of IP allocation for the internal and external networks: (specifically according to your network)
Internal network: IP address 192.168.1.xxx Subnet mask: 255.255.255.0 Gateway: 192.168.1.1
External network: IP address 172.18.100.xxx Subnet mask: 255.255.255.0 Gateway: 172.18.100.1
1. Set the IP address, subnet mask, gateway, and DNS for the external network card properly.
2. Only set the IP address and subnet mask for the internal network card, as a computer cannot set two gateways simultaneously.
3. Add a static route to the computer:
1) In “Start” — “Run”, type cmd to open the command prompt.
2) In the command prompt, type: route add 172.18.0.0 mask 255.255.0.0 172.18.100.254
This command's purpose is to forward all requests to the internal network 172.18.xxx.xxx to the internal network gateway 172.18.100.254.
If your internal network has other subnets, you can add them in the same format.
For example, if your company's internal network also has the address 172.16.1.25,
you can write: route add 172.16.0.0 mask 255.255.0.0 172.18.100.254
Press Enter to execute this command, and the setup for dual network card access to both internal and external networks will be complete.
Notes
■ A computer cannot set two gateways simultaneously, so ensure the internal network card does not have a gateway set.
■ Please adjust the IP addresses and subnets according to the actual network situation.
