nginx+gunicorn+django SSL 不起作用，在 Chrome 上出现 ERR_SSL_PROTOCOL_ERROR，即“此网站无法提供安全连接”。

Question

我刚刚完成了 nginx+gunicorn+django 网络服务器的设置（之前 apache2+wsgi+django 也遇到了同样的问题），并确认它可以通过 http 完美运行。运行 letsencrypt 的 certbot 后，它会正确地将 http 重定向到 https，但是，我的浏览器随后出现标题中提到的错误。我花了很多时间尝试了所有我能想到的方法，现在终于找到了解决方案。文件中的一些注释掉的行可能会揭示我迄今为止尝试过的一些方法。

PS：我尝试运行 ssllabs 并检查你的网站，但没有返回任何有用的东西/我不知道的东西。

附加信息（其中一些可能不需要，但有些可能会有帮助）

运行 Ubuntu 18.04 LTS
nginx nginx/1.14.0
Django 2.2.5
Python 3.6
gunicorn 19.9.0

域名来自 Google Domains，使用 ddclient 中的 googledomains 协议进行 DDNS

文件

# /etc/nginx/sites-available/mysite

upstream your-gunicorn {
    server unix:/tmp/gunicorn.sock fail_timeout=0;
}

server {
    client_max_body_size 4G;
    server_name mysite.net;
    keepalive_timeout 70;
    access_log /var/log/nginx/mysite.access_log;
    error_log /var/log/nginx/mysite.error_log;
    root /home/user/Desktop/Django/mysite;

    location /static/ {
        autoindex on;
        alias /home/user/Desktop/Django/mysite/static/;
        expires 1M;
        access_log off;
        add_header Cache-Control "public";
        proxy_ignore_headers "Set-Cookie";
    }

    location @proxy_to_app {
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header Host $http_host;
        # proxy_set_header X-Forwarded-Proto $scheme;
        proxy_redirect off;
        proxy_pass   http://your-gunicorn;
    }

    location / {
        try_files $uri @proxy_to_app;
    }

    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/nerd-squad.net/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/nerd-squad.net/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot


}


server {
    if ($host = mysite.net) {
        return 301 https://$host$request_uri;
    } # managed by Certbot


  listen 80 default;
  server_name mysite.net;
    return 404; # managed by Certbot


}

# <Django mysite root>/gunicorn/gunicorn-config.py

import multiprocessing

bind = 'unix:/tmp/gunicorn.sock'
workers = multiprocessing.cpu_count() * 2 + 1
reload = True
daemon = True
accesslog = './access.log'
errorlog = './error.log'

# <Django Site Root>/mysite/settings.py

"""

import os

# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))


# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/2.0/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = <nope>

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = False

ALLOWED_HOSTS = [
    <nope>
]


# Application definition

INSTALLED_APPS = [
    'home.apps.HomeConfig',
    'pics.apps.PicsConfig',
    'welcome.apps.WelcomeConfig',
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
]

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
]

ROOT_URLCONF = 'mysite.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
        },
    },
]

WSGI_APPLICATION = 'mysite.wsgi.application'


# Database
# https://docs.djangoproject.com/en/2.0/ref/settings/#databases

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': os.path.join(BASE_DIR, 'db.sqlite3')
    }
}


# Password validation
# https://docs.djangoproject.com/en/2.0/ref/settings/#auth-password-validators

AUTH_PASSWORD_VALIDATORS = [
    {
        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
    },
]


# Internationalization
# https://docs.djangoproject.com/en/2.0/topics/i18n/

LANGUAGE_CODE = 'en-us'

TIME_ZONE = 'America/Chicago'

USE_I18N = True

USE_L10N = True

USE_TZ = True


# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/2.0/howto/static-files/

STATIC_URL = '/static/'

STATICFILES_DIRS = [
    os.path.join(BASE_DIR, "staticfiles"),
]

#STATIC_ROOT = os.path.join(BASE_DIR, "static")
STATIC_ROOT = '/home/user/Desktop/Django/static'


#SECURE_PROXY_SSL_HEADER = ('HTTP_X_FORWARDED_PROTO', 'https')

# nginx -t

nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful

# /etc/letsencrypt/options-ssl-nginx.conf

# This file contains important security parameters. If you modify this file
# manually, Certbot will be unable to automatically provide future security
# updates. Instead, Certbot will print and log an error message with a path to
# the up-to-date file that you will need to refer to when manually updating
# this file.

ssl_session_cache shared:le_nginx_SSL:1m;
ssl_session_timeout 1440m;

ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_prefer_server_ciphers on;

ssl_ciphers <nope>;

如果需要的话我可以提供更多信息。谢谢！