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#+TITLE: Creating a "What Is My IP" website in four lines with nginx
#+DATE: 2024-12-02T20:28:47-05:00
#+DRAFT: false
#+DESCRIPTION:
#+TAGS[]: nginx
#+KEYWORDS[]: nginx
#+SLUG:
#+SUMMARY:
I recently wanted to create an endpoint on a development machine that
could return my external IP address. Normally I would use one of a
handful of services https://canhazip.com/ or https://ifconfig.ca/, but
I wanted to see how easy it would be to make my own. As it turns out,
it's incredibly easy, and doesn't even require leaving the reverse proxy.
Using =nginx=, we can just create a block like this.
#+begin_src
location /ip {
default_type text/plain;
return 200 "$remote_addr\n";
}
#+end_src
Where location =/ip= is the path that returns the IP.
If we were to put that into a full server configuration, it might look
something like this.
#+begin_src
server {
listen 80 default_server;
server_name _;
location / {
default_type text/plain;
return 200 "$remote_addr\n";
}
}
#+end_src
It's really that simple. Now nginx will happily return the requesting
IP address. No need to proxy to another application or service.
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