Category Archives: Software

Ubuntu Cloned VMs getting Duplicate IPs (and yes – the MAC Addresses are unique)

Notes, Software, Uncategorized

Short mystery regarding cloned Ubuntu VMs with different MAC Addresses being allocated the same IP Addresses by DHCP.

Demystifying SS7 & Sigtran – Part 4 – Routing with Point Codes

GSM, Mobile Networks, RFCs & Standards, Software, Voice over IP

Getting from Point Code A to Point Code Z.

Telephony binary-coded decimal (TBCD) in Python with Examples

EPC, LTE, Mobile Networks, Python, RFCs & Standards, SDM, Software

Chances are if you’re reading this, you’re trying to work out what Telephony Binary-Coded Decimal encoding is. I got you. Again I found myself staring at encoding trying to guess how it worked, reading references that looped into other references, in this case I was encoding MSISDN AVPs in Diameter. How to Encode a number … Continue reading Telephony binary-coded decimal (TBCD) in Python with Examples →

Adding Vlans to VMware Workstation

Software

Setting up VLANs in Workstation to allow ever-more complicated network setups.

K8s multiple objects in YAML File

Software

Defining multiple K8 objects in the same YAML file

Open5Gs Database Schema Change

5G SA, EPC, LTE, Mobile Networks, SDM, Software

New database time to support slicing and a migration path for existing users.

A very unstable Diameter Routing Agent (DRA) with Kamailio

EPC, Kamailio, LTE, Mobile Networks, SDM, Software

I’d been trying for some time to get Kamailio acting as a Diameter Routing Agent with mixed success, and eventually got it working, after a few changes to the codebase of the ims_diameter_server module. It is rather unstable, in that if it fails to dispatch to a Diameter peer, the whole thing comes crumbling down, … Continue reading A very unstable Diameter Routing Agent (DRA) with Kamailio →

Diff + Wireshark

Notes, RFCs & Standards, Software

Comparing packet contents with Wireshark and a diff utility

PyHSS Update – YAML Config Files

EPC, LTE, Mobile Networks, Python, Software

Introducing YAML based config files for defining how PyHSS should be setup

Being mean to Mikrotiks – Pushing SMB File Share

Linux, Notes, Software

A Mikrotik is not a NAS. Or is it?
No.

PyHSS New Features

5G SA, LTE, Mobile Networks, Python, Security, Software

Thanks to some recent developments, PyHSS has had a major overhaul recently, and is getting better than ever, Some features that are almost ready for public release are: Config File Instead of having everything defined all over the place a single YAML config file is used to define how the HSS should function. SCTP Support … Continue reading PyHSS New Features →

GIF showing using Redis-CLI to get a value

Adding SNMP to anything with Redis and Python

Notes, Python, Software

Bolting an SNMP Server and stats collection onto your existing Python projects.

VoIP is an only child – ‘Gotchas’ on running VoIP applications inside Containers

Software, Voice over IP

It’s 2021, and everyone loves Containers; Docker & Kubernetes are changing how software is developed, deployed and scaled. And yet so much of the Telco world still uses bare metal servers and dedicated hardware for processing. So why not use Containers or VMs more for VoIP applications? Disclaimer – When I’m talking VoIP about VoIP … Continue reading VoIP is an only child – ‘Gotchas’ on running VoIP applications inside Containers →

Dr StrangeEncoding or: How I learned to stop worrying and love ASN.1

Mobile Networks, Python, RFCs & Standards, Software

Australia is a strange country; As a kid I was scared of dogs, and in response, our family got a dog. This year started off with adventures working with ASN.1 encoded data, and after a week of banging my head against the table, I was scared of ASN.1 encoding. But now I love dogs, and … Continue reading Dr StrangeEncoding or: How I learned to stop worrying and love ASN.1 →