https://www.juniper.net/documentation/us/en/software/junos/gtp-sctp/topics/topic-map/gs-policy-based-gtp.html
Policy-Based GTPv1 and Inspection Objects | Junos OS | Juniper Networks
Learn how GTP policies define rules that permit, deny, or tunnel traffic. The device performs GTP policy filtering by inspecting every GTP packet against these...
junos ospolicybasedgtpv1inspection