ike-scan is a utility that discovers IKE hosts and can also fingerprint them using the retransmission backoff pattern.
You can download it from the following link: https://packetstormsecurity.com/files/download/54005/ike-scan-1.9.tar.gz
Source: https://packetstormsecurity.com/files/54005/ike-scan-1.9.tar.gz.html

