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DNS 'ANY', 'A', 'AAAA', 'TXT', 'MX', and 'CNAME' responses for known forward DNS names
DNS IPv4 PTR responses
Responses to HTTP/1.1 GET requests against various HTTP ports
Responses to HTTP/1.1 GET requests against various HTTPS ports
SYN scan results for common TCP services across all of IPv4
X.509 certificate metadata observed when communicating with HTTPS endpoints
X.509 certificate metadata observed when communicating with miscellaneous non-HTTPS endpoints, such as IMAPS, POP3S, etc.
UDP scan results for common UDP services across all of IPv4
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