pubIp

Simple dynamic DNS resolver which works with Tomato and requires only Python 3.

Just run it.

$ /usr/bin/python3 pubip.py

Supervisor config example

$ cat /etc/supervisor/conf.d/pubip.conf

[program:pubip]
command=/path/to/python3 pubip.py
directory=/YOUR_DIR/pubip
user=NOT_ROOT_FOR_PETES_SAKE
autostart=true
autorestart=true
redirect_stderr=true

Setup in Tomato

0. In the left menu under Basic -> DDNS set "auto-refresh every" to e.g. 1 days.
1. In the Service dropdown choose: Custom URL.
2. Add URL to where you have this service running: http://YOUR_SERVER.TLD/update/YOUR_KEY/@IP.
3. Check Force next update.
4. Hit Save.
5. Verify Last IP Address and Last Result
6. Point your browser to http://YOUR_SERVER.TLD/show/YOUR_KEY to see what YOUR_KEY is bound to.
7. Or check if redirects works as intended with http://YOUR_SERVER.TLD/go/YOUR_KEY/PORT.

API

/show/:user:

Shows the current IP that is set for key :user.

/update/:user/:ip:

Updates the current IP.

:ip must match the request client address.

/go/:user/:port:

This redirects you to whatever IP that :user is set to along with :port.

Caveat

All state is in-memory. If service restarts, there will be a delay (whatever you set auto-refresh to) before Tomato updates the IP. ('._.)

Anyone can overwrite an added key. (;._.)

Two Tomato-routers set to update the same key will essentially slap each other silly with trouts. (╯._.)╯︵ ┻━┻