Make your own DynDns, with hookers and blackjack ;) .. and an external server running nginx

The software has 2 services to be deployed on your client and your server. The client will simply send a POST request containing a secret.
The server will save the data to a database (to install and setup separately), everytime an unknown IP posts the secret password to the server Nginx configuration scripts will be
overwritten in /etc/nginx/conf.d/ and the server will be restarted. multiple cli multiple clients are not supported yet, anyways feel free to use the code any way you want.

simply add an application.properties file to the resources Path, containing the configuration you would like to run.

 server.port:9999
 
 server.servlet.session.persistent=false
 spring.datasource.url=jdbc:mysql://<SQLAddress>:3306/<DB_Name>
 spring.datasource.username=<USER>
 spring.datasource.password=<PASSWORD>
 spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect

THE SERVER NEEDS A DATABASE TO WORK
Table cration:
feel free to rename the table just think about the @Entity name if you do.

create table my_dashboard_ip_log
(
    id   int auto_increment
        primary key,
    ip   longtext    not null,
    time datetime(6) not null
);

THE SERVER REQUIRES TEMPLATES TO WORK
Templates are read from the working directory.
The marker for IP replacement is [<NewIp>]
Example:

stream {
upstream ssh {
    server [<NewIp]:22;
}
server {
    listen        80;
    server_name ssh.cool.Dyn.Dns.com;
    
    ....

    proxy_pass    ssh;
} }

The client works Out-Of-The-Box, just follow the release instructions.

Each of the to projects contains a release-Directory, it contains a *.service file to have the jar be deployed by systemd on boot. please pay attention to the contents, they ONLY work for my computers since they contain absolute paths.

After developing changes, clean and build both projects, move the new compiled jars to their release Path and restart all services on all machines! I usually push the server jar to github to get it on server.

Feel free to contribute any way you want. Open Issues, contact me by email ([email protected]) or make a sacrifice to the Gods.. Any help is highly appreciated ;)

colla69 (Andrea Colarieti Tosti)