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Securing GTP and SCTP Traffic

  • GTP: Filtering/masking ULI IE message parameters—In Junos OS Release 23.1R1, we've introduced the mask-uli configuration statement. You can use this statement to configure a GPRS tunneling protocol (GTP) profile that masks the User Location Information (ULI) element in GTPv1 and GTPv2. You can also control the mask value for the ULI, which can range from 1 through 65,535 (in hexadecimal, 00 01 to FF FF). The GTP profile is attached to a policy to meet the necessary conditions for masking the ULI, as determined by the operator.

    [See mask-uli].

  • VRF support with SCTP (MX Series)—Starting in Junos OS Release 23.1R1, we support virtual routing and forwarding (VRF) for SCTP associations. You can use this feature to manage remote IP addresses. When an SCTP association is established over a VRF instance, the kernel must consider an additional parameter—the VRF ID—in addition to the traditional 4-tuple (source IP, source port, destination IP, destination port) when searching for unique associations.

    [See SCTP Support for Virtual Routing and Forwarding (VRF)].

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