Methods, systems, and computer readable media for implementing indirect general packet radio service (GPRS) tunneling protocol (GTP) firewall filtering using diameter agent and signal transfer point (STP)
US11411925B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 2019 |
| Grant date | Aug 9, 2022 |
| Priority date | — |
| Expiry date | Dec 30, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/16
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method for implementing indirect GTP firewall filtering includes using a signaling message routing node to dynamically populate an indirect GTP-C firewall filtering database with IMSIs and VPLMN IDs extracted from mobility management signaling messages for updating the locations of outbound roaming subscribers. The method further includes receiving a CCR-I message generated in response to a GTP-C message. The method further includes extracting an IMSI and a VPLMN ID from the CCR-I message. The method further includes accessing the indirect GTP-C firewall filtering database using the IMSI extracted from the CCR-I message. The method further includes determining that a record corresponding to the IMSI is present in the indirect GTP-C firewall filtering database. The method further includes determining that a VPLMN ID in the record does not match the VPLMN ID extracted from the CCR-I message. The method further includes, in response to determining that the VPLMN ID in the record does not match the VPLMN ID extracted from the CCR-I message, rejecting the CCR-I message.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.