Uwp cannot connect to vmware server IP

Question

As mentioned in title, my uwp app cannot connect to the ip address of the server running in my vmware, as figure:

This server was written in nodejs, it can be connected through postman and wpf httpclient, but when I used uwp httpclient to send a post request, the uwp app gave me this response:

*System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Exception: The text associated with this error code could not be found.  
A connection with the server could not be established*  

For your information:

• I've enabled uwp capabilities: Private Networks (Client & Server), Internet (Client & Server)
• I've enabled network loopback for my uwp using checknetisolation

My vmware is using nat network setting, as figure:

It would be great if someone could help me on this, I've searched for two weeks on internet and couldn't find any solution. Your helps would be appreciated!

Answer 1

The Test-NetConnection you posted shows that host and guest are sharing the same ip address, so you'll likely want bridged. If bridged then the guest will connect to the same DHCP server as the host to get its own ip address, or on the guest vEthernet (within the guest itself) you can set a static ip address as needed.

You'll also likely need to open port 3038 thru firewalls.
https://learn.microsoft.com/en-us/windows/security/threat-protection/windows-firewall/create-an-inbound-port-rule

ICMP is blocked by default when the firewall profile is private or public, so no real worries there.

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Answer 2

Might test on both ends at problem source and on server itself

Test-NetConnection -Port 3038 -ComputerName "192.168.138.138" -InformationLevel "Detailed"

testing on the server will confirm something listening or not on that port
testing on problem source will confirm firewall and or routing issues

then assuming it can respond to ICMP echo you could also try
tracert 192.168.138.138

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Answer 3

I'm sorry, I know nothing of UWP, my answers were purely from a windows networking perspective. I could only guess maybe they use different ports? This tool may help you to get that answer. https://learn.microsoft.com/en-us/sysinternals/downloads/tcpview

or a simple netstat -aon on server to show what is listening and on what ports

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