Hi there,
I see a few cases of the same error as mine in Issues, and I thought I should do something to give you more information to make changes to this issue.
Next I used the same code on two computers, using the company network and 4G network to test The following two links
PC [001]
OS Name: Windows, OS Version: 10.0.19042, RID: win10-x64
Macafee Version:

Pulse Secure Version:

PC[002] =>Restore factory mode
OS Name: Windows, OS Version: 10.0.18362, RID: win10-x64
Link1:https://sfapi-sbox.sf-express.com/std/service
Link2:https://demo.identityserver.io/.well-known/openid-configuration
1.Using the company network
| PC [001] |
link1 |
Link2 |
| .netcore 3.1 |
OK |
OK |
| .netcore 5.0 |
Exception |
OK |
| Exception:A connection attempt failed because the connected party did not properly respond after a period of time,or established connection failed because connected host has failed to respond. |
|
|
| PC [002] |
link1 |
Link2 |
| .netcore 3.1 |
OK |
OK |
| .netcore 5.0 |
OK |
OK |
2.Using the 4G network
| PC [001] |
link1 |
Link2 |
| .netcore 3.1 |
OK |
OK |
| .netcore 5.0 |
Exception |
OK |
| PC [002] |
link1 |
Link2 |
| .netcore 3.1 |
OK |
OK |
| .netcore 5.0 |
OK |
OK |
Hi there,
I see a few cases of the same error as mine in Issues, and I thought I should do something to give you more information to make changes to this issue.
Next I used the same code on two computers, using the company network and 4G network to test The following two links
PC [001]
OS Name: Windows, OS Version: 10.0.19042, RID: win10-x64


Macafee Version:
Pulse Secure Version:
PC[002] =>Restore factory mode
OS Name: Windows, OS Version: 10.0.18362, RID: win10-x64
Link1:https://sfapi-sbox.sf-express.com/std/service
Link2:https://demo.identityserver.io/.well-known/openid-configuration
1.Using the company network
2.Using the 4G network