Glossary
ASN (Autonomous System Number)
The number identifying the network operator that announces an IP address; in the Okta System Log it tells you whose network a request came from.
An Autonomous System Number identifies a network operator on the internet: an ISP, a mobile carrier, a cloud or hosting provider, a large company. Okta records it for each event in securityContext.asNumber, with the operator's name in securityContext.asOrg and isp. Responders use it to tell a home broadband connection from a VPS, and to spot one session used from two different networks, a strong sign of cookie theft (session hijacking). Mobile devices switching between Wi-Fi and cellular data legitimately change ASN, which is a common false positive (tuning).