Create our Docker Container
Create a nginx reverse proxy by issuing the following command:
docker run -d \ --net host \ --restart=always \ -p 80:80 \ --name proxy \ -v $PWD/conf:/etc/nginx/sites-enabled \ -v $PWD/letsencrypt:/etc/letsencrypt \ -v $PWD/conf.d:/etc/nginx/conf.d \ lerenn/nginx-reverse-proxy
This will create a reverse proxy running on the host network.
Define our Nginx Configuration Files
In the conf folder(mapped to sites-enabled) we defined in our docker command we will add a configuration like the following:
server {
listen 80;
server_name wiki wiki.jmehan.com;
location / {
proxy_pass http://192.168.1.60:8090/;
}
}
Adding SSL Support (not certbot)
If we want to terminate an SSL connection at our proxy, we can generate an SSL cert and configure it in nginx.
Generate the SSL certificate using the following command:
> openssl req -nodes -new -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -days 7300
This command will generate a self signed SSL certificate valid for 10 years.
Configure the endpoint to use the certificates. Here we are defining the docker location for the certs.
server {
listen 8443 ssl;
#server_name svn svn.jmehan.com;
ssl_certificate /etc/nginx/certificates/svn/cert.pem;
ssl_certificate_key /etc/nginx/certificates/svn/key.pem;
location / {
proxy_pass http://192.168.1.60:9080/;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
client_max_body_size 10m;
client_body_buffer_size 128k;
proxy_connect_timeout 90;
proxy_send_timeout 90;
proxy_read_timeout 90;
proxy_buffer_size 4k;
proxy_buffers 4 32k;
proxy_busy_buffers_size 64k;
proxy_temp_file_write_size 64k;
}
}
Adding Basic Authentication
You may need to add apache2-utils to your nginx docker container using the following cmd:
> sudo apt-get install apache2-utils
Login to the docker container and create the password file
> docker exec -it <nginx_container> bash
Create a password file
> htpasswd -c /etc/nginx/conf.d/htpasswd <username>
Update the configuration
server {
server_name kibana kibana.jmehan.com;
location / {
proxy_pass http://192.168.1.60:5601/;
auth_basic "Administrator's Area";
auth_basic_user_file /etc/nginx/conf.d/htpasswd;
}
}
Supporting Sites that use websockets
server {
server_name homebridge homebridge.jmehan.com;
location / {
proxy_pass http://192.168.1.60:8089/;
proxy_http_version 1.1;
proxy_buffering off;
proxy_set_header Host $host;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "Upgrade";
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forward-For $proxy_add_x_forwarded_for;
}
}
Redirecting all traffic to SSL
server {
server_name www.server.com server.com;
listen 443 ssl;
location / {
proxy_pass http://192.168.1.60:12345/;
}
ssl_certificate /etc/letsencrypt/live/www.server.com-0001/fullchain.pem; # managed by Certbot
ssl_certificate_key /etc/letsencrypt/live/www.server.com-0001/privkey.pem; # managed by Certbot
include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
}
server {
server_name www.server.com server.com;
listen 80;
return 301 https://www.diabetease.com$request_uri;
}
Forwarding Real IP Address
Add X-Real-IP and X-Forwarded-For headers using the proxy_set_header instruction by adding it to the /etc/nginx/conf.d/proxy.conf file.
proxy_redirect off; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; client_max_body_size 10m; client_body_buffer_size 500m; client_header_buffer_size 500m; proxy_connect_timeout 90; proxy_send_timeout 90; proxy_read_timeout 90; proxy_buffer_size 16k; proxy_buffers 32 16k; proxy_busy_buffers_size 64k;
Restricting Access to IP Range
In the following example, we restrict access to a login page in confluence to internal ip addresses between: 192.168.1.100-255
See https://www.ipaddressguide.com/cidr for creating ip range.
# restrict access to login to 192.168.1.100-255
location /login.action {
allow 192.168.1.100/30;
allow 192.168.1.104/29;
allow 192.168.1.112/28;
allow 192.168.1.128/25;
deny all;
proxy_pass http://192.168.1.50:8090/login.action;
}
Customized Dockerfile
The following Dockerfile adds certbot and apache2-utils to our nginx-reverse-proxy image.
FROM lerenn/nginx-reverse-proxy RUN apt-get update RUN apt-get install -y wget RUN apt-get install -y apache2-utils RUN wget https://dl.eff.org/certbot-auto RUN chmod +x certbot-auto RUN ./certbot-auto -n --install-only
References
| Reference | URL |
|---|---|
| Let's Encrypt | CertBot and Let's Encrypt |
| Restricting Access with HTTP Basic Authentication | https://docs.nginx.com/nginx/admin-guide/security-controls/configuring-http-basic-authentication/ |