Internet Connection Sharing don't work if change ip

Question

When Internet Connection Sharing (ICS) is enabled on an NIC that is connected to the direct Internet line, the second NIC automatically gets the 192.168.137.1 IP address and 255.255.255.0 subnet mask. Since the first IP address of the address range is set on the second NIC of the computer, the other client computers receive the other IP addresses from the same range, for example 192.168.137.2, 192.168.137.3 and so on.

In my case, I already have static IP Network using 10.0.0.0/8 network, I want to change Default IP from 192.168.137.1/24 to 10.0.0.1/8. i don't ping to 8.8.8.8

Answer 1

You can use Windows Routing and NAT (via RRAS) Instead of ICS

Instead of using ICS, you can use Routing and Remote Access Service (RRAS) which supports custom IP ranges and is much more flexible.

Steps (summary):

1. Open Server Manager or install RRAS by this script bellow:

Install-WindowsFeature -Name RemoteAccess -IncludeManagementTools

Open Routing and Remote Access, configure as:

"Custom configuration"

  Enable NAT
  
     Select the NIC connected to the internet for NAT.
     
     Manually assign IP 10.0.0.1/8 to the internal NIC.
     

1. Ensure DHCP is running or assign static IPs in 10.0.0.0/8 range to clients with 10.0.0.1 as default gateway.

Set DNS to 8.8.8.8 or internal DNS server.