GTPv0/v1 message filtering

FortiOS Carrier supports message filtering for all GTPv0/v1 message types as defined by 3GPP TS 29.060. Using GTPv0/v1 message filtering you can configure a GTP profile to allow or deny different types of GTPv0/v1 messages. All message types are allowed by default and you can create message filters to select message types to deny.

You can also use unknown message filtering to filter GTPv0v1 message types that FortiOS Carrier does not have message filtering options for. Unknown messages are usually new messages that are in use on your network but have only recently been added to GTPv0v1 by the 3GPP. These messages may be considered by the 3GPP as reserved or for future use.

You can set unknown-message to deny to block all unknown GTPv0/v1 message types. If you set unknown-message to deny, you can allow selected unknown message types by adding the IDs of these message types to the unknown-message-white-list option.

From the CLI, use the following command to add GTPv0/v1 message filtering to a GTP profile:

config firewall gtp

edit <name>

set message-filter-v0v1 <gtpv0v1-message-filter-name>

end

Use the following command to create a GTPv0/v1 message filter:

config gtp message-filter-v0v1

edit <name>

set unknown-message {allow | deny}

set unknown-message-white-list {1 2 ... 255}

set echo {allow | deny}

set version-not-support {allow | deny}

set node-alive {allow | deny}

set redirection {allow | deny}

set create-pdp {allow | deny}

set update-pdp {allow | deny}

set delete-pdp {allow | deny}

set v0-create-aa-pdp--v1-init-pdp-ctx {allow | deny}

set delete-aa-pdp {allow | deny}

set error-indication {allow | deny}

set pdu-notification {allow | deny}

set support-extension {allow | deny}

set send-route {allow | deny}

set failure-report {allow | deny}

set note-ms-present {allow | deny}

set identification {allow | deny}

set sgsn-context {allow | deny}

set fwd-relocation {allow | deny}

set relocation-cancel {allow | deny}

set fwd-srns-context {allow | deny}

set ue-registration-query {allow | deny}

set ran-info {allow | deny}

set mbms-notification {allow | deny}

set create-mbms {allow | deny}

set update-mbms {allow | deny}

set delete-mbms {allow | deny}

set mbms-registration {allow | deny}

set mbms-de-registration {allow | deny}

set mbms-session-start {allow | deny}

set mbms-session-stop {allow | deny}

set mbms-session-update {allow | deny}

set ms-info-change-notif {allow | deny}

set data-record {allow | deny}

set end-marker {allow | deny}

set gtp-pdu {allow | deny}

end

From the GUI, create or edit a GTP profile, select Message Filtering, and select a message filter to add a GTPv0/v1 message filter to the profile.

To create a GTPv0/v1 message filter from the GUI, go to Security Profiles > GTP Message Filters and select Create New > Message filter for GTPv0/v1.

The following table lists FortiOS Carrier GTPv0v1 message filtering options and describes the GTPv0v1 message types and message IDs they apply to.

Message filtering option	GTPv0/v1 message types and values
echo	Echo request (1) and Echo response (2).
version-not-support	Version not supported (3).
node-alive	Node alive request (4). Node alive response (5).
redirection	Redirection request (6). Redirection response (7).
create-pdp	Create PDP context request (16). Create PDP context response (17).
update-pdp	Update PDP context request (18). Update PDP context response (19).
delete-pdp	Delete PDP context request (20). Delete PDP context response (21).
v0-create-aa-pdp--v1-init-pdp-ctx	GTPv0: Create AA PDP context request (22). Create AA PDP context response (23). or GTPv1: Initiate PDP context activation request (22). Initiate PDP context activation response (23).
delete-aa-pdp	GTPv0: Delete AA PDP context request (24). Delete AA PDP context request response (25).
error-indication	Error indication (26).
pdu-notification	PDU notification request (27). PDU notification response (28). Reject PDU notification request (29). Reject PDU notification response (30).
support-extension	GTPv1 Supported extension headers notify (31).
send-route	Send routing information for GPRS request (32). Send routing information for GPRS response (33).
failure-report	Failure report request (34). Failure report response (35).
note-ms-present	Note MS GPRS present request (36). Note MS GPRS present response (37).
identification	Identification request (48). Identification response (49).
sgsn-context	SGSN context request (50). SGSN context response (51). SGSN context ack (52).
fwd-relocation	GTPv1: Forward relocation request (53). Forward relocation response (54). Forward relocation complete (55). Forward relocation complete ack (59).
relocation-cancel	GTPv1: Relocation cancel request (56). Relocation cancel response (57).
fwd-srns-context	GTPv1: Forward SRNS context (58). Forward SRNS context ack 60).
ue-registration-query	UE Registration Query request (61). UE Registration Query response (62).
ran-info	GTPv1: RAN information relay (70).
mbms-notification	GTPv1: MBMS notification request (96). MBMS notification response (97). MBMS notification reject request (98). MBMS notification reject response (99).
create-mbms	GTPv1: Create MBMS context request (100) Create MBMS context response (101).
update-mbms	GTPv1: Update MBMS context request (102) Update MBMS context response (103).
delete-mbms	GTPv1: Delete MBMS context request (104). Delete MBMS context response (105).
mbms-registration	GTPv1: MBMS registration (request 112, response 113).
mbms-de-registration	GTPv1: MBMS de-registration request (114) MBMS de-registration response (115).
mbms-session-start	GTPv1: MBMS session start request (116). MBMS session start response (117).
mbms-session-stop	GTPv1: MBMS session stop request (118). MBMS session stop response (119).
mbms-session-update	GTPv1 MBMS session update request (120). MBMS session update response (121).
ms-info-change-notif	GTPv1: MS info change notification request (128). MS info change notification response (129).
data-record	Data record transfer (request 240, response 241).
end-marker	GTPv1: End marker (254).
gtp-pdu	G-PDU (255).