Identity Server 4 endpoints ports not filled - nginx

Question

Spec:
.net core 2
Identity Server 4
On local dev machine when I visit by Postman http://127.0.0.1:5000/.well-known/openid-configuration i can find for examply "jwks_uri" with address http: //127.0.0.1:5000/.well-known/openid-configuration/jwks
I can visit http: //127.0.0.1:5000/.well-known/openid-configuration/jwks and see result like:
{
"keys": [
{
"kty": "RSA",
"use": "sig",
"kid": "6ca39c3dd4ffda97d502243e25fa4e54",
"e": "AQAB",
"n": "sZthlS0HE1pkbSnMlPyKNDkAqkQryeKG7YSRMeUbrDQARu-9f11iUFUblAdXUhuFRu0R77AQ-mhjy7kfjQMOT58gp3aMa17HTKcMxZRZEi-zcXZuxVA7Q0nuWrWp4_-0VAMV4OhGromZCFtUb26kRJXyKMNlHSM2irSJ9LWnx6NtSkHMrC_kv3kpciZWLx__9DkVM7wmYuGz9DMezoz7-FuwcJcGJHmVz7RNRwGNhdcvEG8nJE3fl8QQ16CjOim2X845gaIc9dWKi1MAA_LS1M2EK4aU8FZjVqgQgY472zrwGtUtwz25aUEZu130fthZabvOiWTDbztuYtOmrxP7BQ",
"alg": "RS256"
}
]
}
Port 5000 is the most important thing
DEV MACHINE SCREENSHOT
On local dev machine when I visit by Postman http://192.168.168.13:81/.well-known/openid-configuration i can find for examply "jwks_uri" with address http: //192.168.168.13/.well-known/openid-configuration/jwks
I cannot visit http://192.168.168.13/.well-known/openid-configuration/jwks beacuse i recieve error 404:
nginx error!
The page you are looking for is not found.
There is no port 81
I can visit http: //192.168.168.13:81/.well-known/openid-configuration/jwks and see result like:
{
"keys": [
{
"kty": "RSA",
"use": "sig",
"kid": "6ca39c3dd4ffda97d502243e25fa4e54",
"e": "AQAB",
"n": "sZthlS0HE1pkbSnMlPyKNDkAqkQryeKG7YSRMeUbrDQARu-9f11iUFUblAdXUhuFRu0R77AQ-mhjy7kfjQMOT58gp3aMa17HTKcMxZRZEi-zcXZuxVA7Q0nuWrWp4_-0VAMV4OhGromZCFtUb26kRJXyKMNlHSM2irSJ9LWnx6NtSkHMrC_kv3kpciZWLx__9DkVM7wmYuGz9DMezoz7-FuwcJcGJHmVz7RNRwGNhdcvEG8nJE3fl8QQ16CjOim2X845gaIc9dWKi1MAA_LS1M2EK4aU8FZjVqgQgY472zrwGtUtwz25aUEZu130fthZabvOiWTDbztuYtOmrxP7BQ",
"alg": "RS256"
}
]
}
SERVER MACHINE SCREENSHOT
This is my Centos firewall settings:
public (active)
target: default
icmp-block-inversion: no
interfaces: eth0
sources:
services: ssh dhcpv6-client
ports: 80/tcp 443/tcp 81/tcp 82/tcp
protocols:
masquerade: no
forward-ports:
source-ports:
icmp-blocks:
rich rules:
This is my nginx configuration for reverse proxy:
server {
listen 81;
location / {
proxy_pass http://127.0.0.1:5000;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection 'upgrade';
proxy_set_header Host $host;
proxy_cache_bypass $http_upgrade;
}
}
As far I have investigated the problem is that in .well-known/openid-configuration there is no proper ports (in that case 81) on server machine.
Endpoints exists, beacuse when I have manually added port 81 to endpoint, endpoint is avaiable.
Beacuse my application relly on .well-known/openid-configuration to autodiscover endpoints my authentication doesn't work. I don't know wether problem is on IdentityServer 4 configuration or on Centos configuration.

Answer 1

If anybody is facing the same issue, the following link will be helpful :)
http://amilspage.com/set-identityserver4-url-behind-loadbalancer/
Especially this part:
app.UseMiddleware<PublicFacingUrlMiddleware>