iaxscan is a Python based scanner for detecting live IAX/2 hosts and then enumerating (by bruteforce) users on those hosts. It does so, in an obvious fashion, by sending valid IAX/2 requests and monitoring responses.
You can download it from the following link: https://packetstormsecurity.com/files/download/70970/iaxscan-0.02.tar.gz
Source: https://packetstormsecurity.com/files/70970/iaxscan-0.02.tar.gz.html