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[GH-ISSUE #226] Cannot generate letsencrypt certificate "Internal Error" #198

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opened 2026-02-26 06:31:23 +03:00 by kerem · 3 comments

kerem commented

2026-02-26 06:31:23 +03:00

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Originally created by @dbrosy on GitHub (Nov 2, 2019).
Original GitHub issue: https://github.com/NginxProxyManager/nginx-proxy-manager/issues/226

Ok I don't understand why this doesn't work.

I have created nginx proxy manager with 80, 81 and 443 open to public. I am trying to secure dashboard on port 81 with proxy.<example.com> (<example.com> not my real domain)

I can browse to http(s)://proxy.example.com and see login page.
If I try to create an ssl cert for my domain i get "internal error" with following in logs:

docker-compose.yml:

version: "3"
services:
  app:
    image: jc21/nginx-proxy-manager:2.0.14
    container_name: nginx-proxy
    restart: always
    ports:
      - "80:80"
      - "443:443"
      - "81:81"
    networks:
      - proxy
    volumes:
      - ./config.json:/app/config/production.json
      - ./data:/data
      - ./letsencrypt:/etc/letsencrypt
    depends_on:
      - db
    environment:
    # if you want pretty colors in your docker logs:
    - FORCE_COLOR=1
  db:
    image: mariadb:10.3
    container_name: nginx-db
    restart: always
    ports:
      - 3306:3306    
    environment:
      MYSQL_ROOT_PASSWORD: ${MYSQL_ROOT_PASSWORD}
      MYSQL_DATABASE: ${MYSQL_DATABASE}
      MYSQL_USER: ${MYSQL_USER}
      MYSQL_PASSWORD: ${MYSQL_PASSWORD}
    networks:
      - proxy
    volumes:
      - ./data/mysql:/var/lib/mysql
#  portainer:
#    image: portainer/portainer
#    container_name: portainer
#    command: -H unix:///var/run/docker.sock
#    restart: always
#    environment:
#      - VIRTUAL_HOST=${VIRTUAL_HOST}
#    networks:
#      - proxy
#    volumes:
#      - /var/run/docker.sock:/var/run/docker.sock
#      - portainer_data:/data

networks:
  proxy:

#volumes:
#  portainer_data:

config.json

{
  "database": {
    "engine": "mysql",
    "host": "db",
    "name": "npm",
    "user": "npm",
    "password": "npm",
    "port": 3306
  }
}

The error seems to be related to /.well-known/acme-challenge/...

What am I doing wrong?

I would like to the create certs for any domain I point to my proxy

Originally created by @dbrosy on GitHub (Nov 2, 2019). Original GitHub issue: https://github.com/NginxProxyManager/nginx-proxy-manager/issues/226 Ok I don't understand why this doesn't work. I have created nginx proxy manager with 80, 81 and 443 open to public. I am trying to secure dashboard on port 81 with proxy.<example.com> (<example.com> not my real domain) ![image](https://user-images.githubusercontent.com/17326295/68071549-8f8dc000-fdcf-11e9-8e5a-c8b428c3e583.png) I can browse to http(s)://proxy.example.com and see login page. If I try to create an ssl cert for my domain i get "internal error" with following in logs: ![image](https://user-images.githubusercontent.com/17326295/68071662-a7197880-fdd0-11e9-9f74-3efef9b23aca.png) #### docker-compose.yml: ``` version: "3" services: app: image: jc21/nginx-proxy-manager:2.0.14 container_name: nginx-proxy restart: always ports: - "80:80" - "443:443" - "81:81" networks: - proxy volumes: - ./config.json:/app/config/production.json - ./data:/data - ./letsencrypt:/etc/letsencrypt depends_on: - db environment: # if you want pretty colors in your docker logs: - FORCE_COLOR=1 db: image: mariadb:10.3 container_name: nginx-db restart: always ports: - 3306:3306 environment: MYSQL_ROOT_PASSWORD: ${MYSQL_ROOT_PASSWORD} MYSQL_DATABASE: ${MYSQL_DATABASE} MYSQL_USER: ${MYSQL_USER} MYSQL_PASSWORD: ${MYSQL_PASSWORD} networks: - proxy volumes: - ./data/mysql:/var/lib/mysql # portainer: # image: portainer/portainer # container_name: portainer # command: -H unix:///var/run/docker.sock # restart: always # environment: # - VIRTUAL_HOST=${VIRTUAL_HOST} # networks: # - proxy # volumes: # - /var/run/docker.sock:/var/run/docker.sock # - portainer_data:/data networks: proxy: #volumes: # portainer_data: ``` #### config.json ``` { "database": { "engine": "mysql", "host": "db", "name": "npm", "user": "npm", "password": "npm", "port": 3306 } } ``` The error seems to be related to /.well-known/acme-challenge/... What am I doing wrong? I would like to the create certs for any domain I point to my proxy

kerem

2026-02-26 06:31:23 +03:00

closed this issue
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kerem commented

2026-02-26 06:31:25 +03:00

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@dbrosy commented on GitHub (Nov 7, 2019):

ok after looking at this for days it looks like my gateway / firewall is causing issue

@dbrosy commented on GitHub (Nov 7, 2019): ok after looking at this for days it looks like my gateway / firewall is causing issue

kerem commented

2026-02-26 06:31:25 +03:00

Author

Owner

@dbrosy commented on GitHub (Nov 7, 2019):

Just an update, I discovered it was caused by a qnap NAS using upnp on 80 and 443.

@dbrosy commented on GitHub (Nov 7, 2019): Just an update, I discovered it was caused by a qnap NAS using upnp on 80 and 443.

kerem commented

2026-02-26 06:31:25 +03:00

Author

Owner

@emass-sec commented on GitHub (Jan 1, 2020):

ok after looking at this for days it looks like my gateway / firewall is causing issue

Same, I turned off port 80 on my firewall recently and then connected the dots that's why I couldn't generate LetsEncrypt certificates in NPM anymore. Opened port 80 to NPM server again, and bam, able to generate certs again. Anyone know why it needs port 80?

@emass-sec commented on GitHub (Jan 1, 2020): > ok after looking at this for days it looks like my gateway / firewall is causing issue Same, I turned off port 80 on my firewall recently and then connected the dots that's why I couldn't generate LetsEncrypt certificates in NPM anymore. Opened port 80 to NPM server again, and bam, able to generate certs again. Anyone know why it needs port 80?

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