and look for the GTP packet
capture icon (
) at the beginning
of rows that capture troublesome GTP packets. In those rows you’ll
see the GTP Event Type (such as Abnormal GTPv2-C message with missing
mandatory IE), the Subscriber Identity (IMSI), source and destination
IP address of the packet, and other information.
If you want more details to verify the event, click the
download icon (
) to download
a packet capture file.
the file to readable format
and verify that the details support the GTP event type.
In this packet capture example, the packet has two headers
GPRS Tunneling Protocol
; a GTP
header inside another GTP header verifies that the GTP-in-GTP event
is not a false positive; it’s identified as a GTP-in-GTP attack.