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95 [sw][linux][windows][ics] share personal network to network switch

computer A with working network (windows)

[!IMPORTANT] If you have windows (host) rebooted, you need to restart the share process, disable then enable. Or make it persistant. Follow tutorial here. 

New-ItemProperty -Path HKLM:\Software\Microsoft\Windows\CurrentVersion\SharedAccess -Name EnableRebootPersistConnection -Value 1 -PropertyType dword
Set-Service SharedAccess –startuptype automatic –passthru
Start-Service SharedAccess
- adapter 1 connect to outside network (to be shared)

  • adapter 2 connect to switch (any port) (shared via it)

  • don't forget to set all dns servers to 114.114.114.114 or 192.168.137.1

  • disable auto powersave Image

Comments

konosubakonoakua · 2024-09-23T14:37:48Z

computer B connected to net switch (ubuntu 22)

#!/bin/bash

export NIC=eno1
export GATEWAY=192.168.137.1
export IP0=192.168.137.2
export IP1=10.9.8.8
export IP2=10.10.9.235

export CONNECTION=$(nmcli -t -f DEVICE,CONNECTION device status | grep $NIC | awk -F: '{print $2}')

sudo nmcli connection modify "$CONNECTION" ipv4.addresses $IP0/24
sudo nmcli connection modify "$CONNECTION" ipv4.gateway $GATEWAY
sudo nmcli connection modify "$CONNECTION" ipv4.dns $GATEWAY
sudo nmcli connection modify "$CONNECTION" ipv4.method manual
sudo nmcli connection modify "$CONNECTION" +ipv4.addresses $IP1/24
sudo nmcli connection modify "$CONNECTION" +ipv4.addresses $IP2/24

sudo nmcli connection up "$CONNECTION"

ip route show
then we get

konosubakonoakua · 2024-09-23T16:27:15Z

https://ubuntu.com/core/docs/networkmanager/edit-connections

konosubakonoakua · 2024-09-27T09:28:05Z

Troubleshooting

  • Cannot access network but can be reached by ping (DHCP working, but IP forwarding not)
  • try re-enable the share
  • disable usb powersave
  • enable ics autostart
  • enable sharedaccess reboot persist
  • https://www.wqy.ac.cn/p/2410-ics-persist/ 
    # fix Windows 10 ICS not working after reboot
# https://support.microsoft.com/en-us/help/4055559/ics-doesn-t-work-after-computer-or-service-restart-on-windows-10
[microsoft.win32.registry]::SetValue("HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\SharedAccess", "EnableRebootPersistConnection", 0x01)

# Enable IP Forwarding
# https://serverfault.com/questions/929081/how-can-i-enable-packet-forwarding-on-windows/929089#929089
Set-NetIPInterface -Forwarding Enabled
# Check IP Forwarding Status
Get-NetIPInterface | Select-Object ifIndex,InterfaceAlias,AddressFamily,ConnectionState,Forwarding | Sort-Object -Property IfIndex | Format-Table

# Change the Internet Connection Sharing (ICS) service Startup type to Automatic.
Set-Service SharedAccess -StartupType Automatic
# Start ICS service for now
Start-Service SharedAccess
# Check ICS service Status
Get-Service SharedAccess