WSL2 SSHD

WSL2 SSHD
(From https://medium.com/@gilad215/ssh-into-a-wsl2-host-remotely-and-reliabley-578a12c91a2)

Install sshd
$ sudo apt install openssh-server

Config sshd with these values
$ sudo nano /etc/ssh/sshd_config
Port 2222
ListenAddress 0.0.0.0
PasswordAuthentication yes

Remove password to sudo
$ sudo nano /etc/sudoers.d/README
%sudo ALL=NOPASSWD: /usr/sbin/service ssh *

Create powershell script file "C:\scripts\wsl-ports.ps1"
#########
# WSL2 network port forwarding script v1
# for enable script, 'Set-ExecutionPolicy -ExecutionPolicy Bypass -Scope CurrentUser' in Powershell,
# for delete exist rules and ports use 'delete' as parameter, for show ports use 'list' as parameter.
# written by Daehyuk Ahn, 2020-08-01

# You should modify '$Ports' for your applications
$Ports = (2222,8080)

# Start SSH Service.
wsl sudo service ssh start

# Display all portproxy information
If ($Args[0] -eq "list") {
	netsh interface portproxy show v4tov4;
	exit;
}

# If elevation needed, start new process
If (-NOT ([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)) {
	# Relaunch as an elevated process:
	Start-Process powershell.exe "-File",('"{0}"' -f $MyInvocation.MyCommand.Path),"$Args runas" -Verb RunAs
	exit
}

# Check WSL ip address
wsl hostname -I | Set-Variable -Name "WSL"
$found = $WSL -match '\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}';
if (-not $found) {
	echo "WSL2 cannot be found. Terminate script.";
	exit;
}

# Remove and Create NetFireWallRule
Remove-NetFireWallRule -DisplayName 'WSL 2 Firewall Unlock';
if ($Args[0] -ne "delete") {
	New-NetFireWallRule -DisplayName 'WSL 2 Firewall Unlock' -Direction Outbound -LocalPort $Ports -Action Allow -Protocol TCP;
	New-NetFireWallRule -DisplayName 'WSL 2 Firewall Unlock' -Direction Inbound -LocalPort $Ports -Action Allow -Protocol TCP;
}

# Add each port into portproxy
Foreach ($Port in $Ports) {
	iex "netsh interface portproxy delete v4tov4 listenaddress=0.0.0.0 listenport=$Port | Out-Null";
	if ($Args[0] -ne "delete") {
		iex "netsh interface portproxy add v4tov4 listenaddress=0.0.0.0 listenport=$Port connectaddress=$WSL connectport=$Port | Out-Null";
	}
}

# Display all portproxy information, Give user to chance to see it when relaunched start
netsh interface portproxy show v4tov4;
If ($Args[0] -eq "runas" -Or $Args[1] -eq "runas") {
	Write-Host -NoNewLine 'Press any key to close! ';
	$null = $Host.UI.RawUI.ReadKey('NoEcho,IncludeKeyDown');
}
#########

Open Startup folder Win+R, "shell:startup", create shortcut:
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -Command "C:\scripts\wsl-ports.ps1"
Right click, properties, Start in: C:\scripts\

Run the shortcut

Access the sshd
$ ssh {wsluser}@{yourcomputer} -p 2222