ASN is

Matches when the request originates from one or more Autonomous System Numbers included in the Defined ASNs list.

This condition determines if a request originated from a specific Autonomous System Number (ASN) by performing a geolocation lookup on the requester’s IP address.

Note:

This web control condition is available on both Request and Response web controls.

Configuration

Defined ASNs: A list of one or more ASNs to match against, each a positive number with no leading zero. The condition returns true if the request’s ASN is present in this list. At least one ASN must be defined.

Measurement

To evaluate this condition, the proxy resolves the IP address from the incoming request and matches it against a geolocation database. It retrieves the ASN associated with that IP and returns true if the number exists within the Defined ASNs list. If the IP address cannot be mapped to an ASN, the condition returns false.

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Last modified on July 10, 2026