ip-server

similar to icanhazip.com

Example

$ ip-server
listening on 0.0.0.0:8000

Now that the server is running on port 8000, we can connect via ip-server or an HTTP client with a GET request

$ ip-server --client localhost:8000
127.0.0.1

$ curl localhost:8000
127.0.0.1

$ firefox localhost:8000

Usage

-h, --help

print help

-v, --version

print version

-c, --client <address>

run as client, connect to address client will print remote address to stdout with a newline

make sure to use fully qualified hostname and port (e.g. localhost:8000 instead of localhost)

-s, --server <address>

run as server, bind to address (default 0.0.0.0:8000)

server will handle both ip-server -c and HTTP GET requests (like from curl)

server will also print client addresses to stdout with a newline