Once upon a time, Skype was THE voice and video calling platform for me. It was independent, decentralized and offered end-to-end encryption. But that was a long time ago, today it’s centralized, more closed source than ever, and encryption seems to be rather optional. But on PCs there was little else that was usable and … Continue reading Nextcloud Talk – Voice and Video Calling – First Impressions
Over the past few weeks, I’ve been using Nextcloud Talk quite a bit. While I’m very happy with it in general, I have actually found two scenarios in which the standard setup is not able to establish a connection between the two (or more) parties of a call: In roaming scenarios with my mobile network … Continue reading A TURN Server for Nextcloud Talk
Domain names are a critical piece of the overall ‘Internet’ puzzle as they are used to identify pretty much every server on the Internet. DNS servers are used to translate a domain name (such as blog.wirelessmoves.com) into the IP address that has been assigned to the server. If this lookup fails for any reason, you … Continue reading Transferring a Domain
In part 6, I’ve been musing a bit about the inter-play between Connection-, Registration- and Session Management. In this part, let’s have a closer look at Session Management and in particular at the standard features that are required for mobile Internet access.
If it is not the first time you come across this blog you are probably aware that I host most of the cloud services I use on (now virtual) servers at home. To make sure my Nextcloud and other services are always available when my main connectivity over DSL fails, I have backup LTE connectivity … Continue reading Moving from Amazon to Hetzner
Today lets have a look at how the 5G Core (5GC) does Connection-, Registration- and Session-Management for 5G devices. As in the previous posts, the procedures are described in 3GPP TS 23.501 which is the 5G analog to the 4G LTE core network description in 3GPP TS 23.401. I guess the similar number is no … Continue reading The 5G Core – Part 6 – Connection-, Registration- And Session Management
Time flies and it’s already 3 years since the previous edition of my book became available. Time for an update and I’ve worked hard over the course of the past 12 months to ensure my introduction book on wireless networks continues to reflect the latest state of how the technology is deployed and functions in … Continue reading From GSM to LTE-Advanced Pro and 5G – My Latest Book Is Now Available!
This post continues the tale of my Freifunk experience I had while spending a week on a castle in Germany. In this part I’ll have a closer look at the performance of my network node and how it was used during the time I ran it at the castle.
I really like the Raspberry Pi platform as it gives me full Linux flexibility for many of my projects. The platform’s limit, however, is networking, as a Pi only has a single 100BaseT Ethernet interface. Yes, it can be extended via additional USB/Ethernet interfaces and I’ve done so in the past but it’s a bit … Continue reading Routing With Linux At The Edge: The Ubiquiti ERX
Recently my firewall at home had a bit of a hick-up and decided to change the rule to forward a high external TCP port number to port 22 of one of my servers into a 1:1 mapping of that port instead. As I was about to go into a long meeting I couldn’t immediately react … Continue reading Port 22 Anecdotes