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How to block software information from BigIP APM
You'll have to figure out how that Censys system creates these guesses. The vendor may be able to provide this information, though security vendors often are secretive or rely on obsucurity: they may not want to divulge how their product works technically in an effort to thwart researchers. It may also be that this Censys product combines multiple sources of information at different layers of the OSI stack and has a complex set of rules to arrive at a guess.
You can read here about how this stuff works at L4 (IP/TCP):
https://my.f5.com/manage/s/article/K9491
You can read here about how this stuff works at L5-L6 (TLS):
You can read about one method to fingerprint a BIG-IP at L7:
https://my.f5.com/manage/s/article/K30552235
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