Need a networking Guru

[Joe L]

I have an issue that just cropped up in the last week or two and cannot find a solution.

Using MSFS2020 on Win11 system, with a local network of several other systems to use: another Win11 desktop, Win11 laptop, Win10 desktop and several Android devices. (all Win systems are Home versions).

Starting about two weeks ago certain MSFS addons with networked web-based connections stopped working on any of the network systems.  NOT WORKING includes ActiveSky web client, Fergo CDU client (737 and 777), and Avia Server (iFly CDU).  Normal error is "ERR_CONNECTION_TIMED_OUT".  Troubleshooter sometimes finds nothing, sometimes says "resource is online but isn't responding to connection attempts".  The connections do work on the host MSFS system using localhost:port#.

Other connections work just as fine as before, including the Fenix remote connections on two android devices, LittleNav Map and Navigraph Simlink on multiple connections.

I have gone through reinstalls, checked all firewall settings on the various systems including my router (eero provided by my ISP), tried switching to ports that I know are open from the good/working connections and tried several different client browsers.  

Any input or thoughts appreciated.

Joe

 

[Joe L]

Resolved.

[FOD]

How?
 

[Joe L]

Using a program TCP view I saw that only certain programs were listening on 127.0.0.1.  Comparison and research indicated they should have been listening on 0.0.0.0.  After some research, I found using the command "netsh http delete iplisten ipaddress=127.0.0.1" was all that was needed to reset, problem solved.  Almost two weeks and a few resets, reinstalls, and that was it...