wsl2_networking_hints.txt

WSL2 Networking instructions:


CONNECT TO WINDOWS SERVICES FROM WSL2
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If you need to connect to a service running inside windows,
use the IP address of the windows machine from WSL2's perspective
	
	HINT! This IP address is its nameserver inside /etc/resolv.conf

You must also create windows firewall rules to allow the inbound/outbound traffic
	- NOTE: Outbound may or may not be necessary. I'm thinking there's a 
	        statefull property of windows defender. PostgreSQL worked without
	        an outbound rule

Finally, ensure that the service you're trying to use allows external connections
	- for example, in PostgreSQL, I needed to update the pg_hba.conf file to allow
	  connections from the 172.19.80.1/20 subnet (WSL's)

CONNECT TO WSL2 SERVICES FROM WINDOWS
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Use the IP address of the WSL2 box.
	- can be found with the "ip a" command


CISCO ANYCONNECT ISSUES
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WSL2 working on Cisco... 
See https://community.cisco.com/t5/vpn/anyconnect-wsl-2-windows-substem-for-linux/td-p/4179888

Open powershell as Admin

# this must be ran every time
Get-NetAdapter | Where-Object {$_.InterfaceDescription -Match "Cisco AnyConnect"} | Set-NetIPInterface -InterfaceMetric 4000

# prioritize WSL network traffic
Get-NetIPInterface -InterfaceAlias "vEthernet (WSL)" | Set-NetIPInterface -InterfaceMetric 1



# get DNS Nameservers
Get-DnsClientServerAddress -AddressFamily IPv4 | Select-Object -ExpandProperty ServerAddresses

# get search domains
Get-DnsClientGlobalSetting | Select-Object -ExpandProperty SuffixSearchList

sudo vim /etc/resolv.conf

# company nameservers
nameserver 10......
....
....

# google
nameserver 8.8.8.8
nameserver 8.8.4.4

# search
search exampledomain.com
...
...