A Python STUN client for getting NAT type and external IP with RFC 5780
stun_protocol project:
https://github.com/nbuckles13/python-stun-protocol
python setup.py install
pystuntest
or
pystuntest -H 'stun_host' --debug
stun.miwifi.com
stunserver.stunprotocol.org
stun.fitauto.ru
stun.hot-chilli.net
stun.syncthing.net