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Myra Online Help Updated · 21 Aug 2026

Matching the AS type

A WAF rule with the Fingerprint condition allows you to match requests based on the type of the autonomous system (AST). The AST is evaluated via the ast: prefix. This allows you to specifically block or allow traffic from a specific AST.

Example_match_AST_EN

Condition: Match the AS type

For example, proceed as follows to evaluate an AS type via the fingerprint:

  • ► Select Request as the request method.
  • ► Add the Fingerprint condition.
  • ► Select the EXACT operator from the drop-down list.
  • ► Enter ast:XX as the value.

The following values are available:

Placeholder Description
XX XX is a placeholder for hosting networks and refers to networks operated by hosting or cloud providers that house the servers used to store and deliver websites, applications, and content.
AC AC is a placeholder for access networks and refers to the networks through which end users are connected to the Internet.
MAL MAL refers to networks that Myra classifies as malicious based on their attack history.