PyHSS Update – IMS Cx Support!
Nick An update to PyHSS to support IMS Authentication for VoLTE
LTE
IMS / VoLTE IPsec on the Gm Interface
The exchange between a UE and P-CSCF to put SIP traffic into IPsec encapsulated payloads.
Using Wireshark to peer inside IPsec ESP VoLTE data from the P-CSCF
Viewing the payload of an Encapsulated Security Payload in Wireshark.
Kamailio Bytes – Configuring Diameter Peers with CDP
Introducing C Diameter Peer module in Kamailio to manage Diameter Peers, monitor their state and handle the connections.
Reverse Engineering Samsung Sysdump Utils to Unlock IMS Debug & TCPdump on Samsung Phones
Reverse Engineering the Samsung Sysdump app to unlock IMS Debug and TCPdump functions
VoLTE/IMS Debugging on Samsung Handsets using Sysdump & Samsung IMS Logger
Unlocking the built in IMS Debugging tool in Samsung's Sysdump Utility
PLMN Identifier Calculation (MCC & MNC to PLMN)
How to encode and decode MCC and MNC as PLMN Identifiers
PyHSS Update – MongoDB Backend & SQN Resync
Feature Update on PyHSS the Python Home Subscriber Server
Querying Auth Credentials from USIM/SIM cards
Using osmo-sim-auth to query USIM/SIM cards authentication mechanism.
HSS & USIM Authentication in LTE/NR (4G & 5G)
Exploring the how and why of Authentication in LTE & NR networks.
Making use of Australian Elevation Data in Forsk Atoll
Importing Elevation data from ELVIS into Forsk Atoll
Why GTP for Mobile Networks?
Why and How GTP is used in LTE networks to carry user data.
Roll your own USIMs for Private LTE Networks
Adventures in getting USIMs to use on private LTE networks.
LTE / EUTRAN – Idle Detach
Overview of the packet flow for a UE Idle detach from the network.
Subscribed-Periodic-RAU-TAU-Timer
Periodic Tracking Area Update timer purpose
The case for Header Compression in VoIP/VoLTE
Robust Header Compression (ROHC) and it's use for compressing RTP / VoLTE traffic headers.
Open5Gs- Python HSS Interface
Note: NextEPC the Open Source project rebranded as Open5Gs in 2019 due to a naming issue. The remaining software called NextEPC is a branch of an old version of Open5Gs.…
Open5GS – Splitting Network Elements
Separating Network Elements (NEs) in NextEPC packet core.
Building Android APN / Carrier Config
How Android OS autoprovisions APN settings and how to set your own for your unique MCC & MNC.
Diameter Routing Agents (DRA)
Basics of DRAs