Recently I found that once wireguard server's NAT is enable, I will not able to create a wi-fi hotspot with Internet access.

Why should not use SharedAccess ?

This service is made for hotspot and can only support one NAT instance, meaning that, you will not able to set up a Wi-Fi hotspot with Internet access because SharedAccess services has been occupied by wireguard server's NAT

However, with New-NetNat command, you'll able to set up many NAT instances and keep wi-fi hotspot work.

How to set up NAT with New-NetNat?

Requirements:

• Windows 10 Anniversary Update or later
• Hyper-V is enabled (But you can set hypervisorlaunchtype to off in bcdedit if you dont want to use hyper-v!) There no is need for hyper-v installation

Disable Internet sharing first.

Then, open powershell with admin permission

# First, get your interface index of wg_server interface Get-NetAdapter # Give a IP to wg_server interface New-NetIPAddress -IPAddress 172.22.0.1 -PrefixLength 24 -InterfaceIndex 68 # Your interface index here New-NetNat -Name wgservernat -InternalIPInterfaceAddressPrefix 172.22.0.0/24 # Your NAT name and interface CIDR here Get-NetNat # 

For test purpose, you can disable SharedAccess service and will find that NAT is working still .

For more information, check this article

Please note New-NetIPAddress should be executed every time you reboot