Posted by jpluimers on 2025/12/09
For my link archive a router I bought a few years back: [Wayback/Archive] GL-SFT1200 Secure Wi-Fi Router On The Go – AC1200 Dual-Band Gigabit Wireless Internet Router | IPv6 | USB 2.0 | MU-MIMO | 128MB RAM | Repeater Bridge | Access Point-M Mode: Amazon.de: Computer & Accessories
- It is USB-C powered (the power brick delivers 3A at 5V, but in reality it uses far less).
- Mode and reset buttons are behind the antenna (see picture below).
- It is specced as AC1200, but that’s just theoretical a number.
- It came with EU and UK plug.
I needed it because from prior experience, I knew GL.iNEt can support a special Wireless Repeater mode where it still functions as a router (hiding the LAN/WLAN behind NAT)

Two physical drawbacks likely due to the portable nature:
the plastic RJ45 ports are slightly too wide which means that these keep falling out [Wayback/Archive] Inline® Dust cover, for RJ45 socket, color: green, 100pcs. Pack: Amazon.de: Electronics & Photo
- no holes in the base to hang it to a wall
One firmware drawback: it shipped with v3.212 for which I could not find release notes. Luckily the firmware v3.215 I upgraded to had: [Wayback/Archive] Firmware v3.215 is released – Technical Support – GL.iNet.
Links to product and manuals (the paper manual are just two thin sheets, but the on-line documentation is OK; I was surprised WireGuard and Tor were supported!):
Read the rest of this entry »
Posted in Communications Development, Development, DHCP, Ethernet, GL.iNet, GL.iNET GL-SFT1200, Hardware, Internet protocol suite, Network-and-equipment, Power User, routers, UDP, WiFi, Windows, WinSCP | Leave a Comment »
Posted by jpluimers on 2025/08/13
[Wayback/Archive] GS305E | Easy Smart Managed Essentials Switch | NETGEAR Support which can do many-to-one port mirroring.
This is a newer and cheaper hardware revision than the:
- GS105Ev2 (which is managed and can do port-mirroring, and is confusingly sold as GS105E-200) which in Germany already is end-of-life
- GS105Ev1 (which is unmanaged and cannot do port-mirroring and is confusingly sold as GS105E-100) which is end-of-life but still sold
Via [Wayback/Archive] Everyone Should Have One of These – EASY Packet Capture! – YouTube who explains very well why you need a switch that can do port-mirroring, then recommends the GS105E but forgets to mention:
- there are different revisions of the GS105E with the above drawbacks
- there is GS305E
Related:
Read the rest of this entry »
Posted in Blue team, Communications Development, Development, Ethernet, Hardware, Internet protocol suite, Network-and-equipment, Power User, Red team, Security, Software Development, TCP, UDP | Leave a Comment »
Posted by jpluimers on 2023/12/26
Every once in a while Jan Schaumann writes a long Twitter thread and saves it in a blog post. Always good ways to learn. This time it was no different: [Wayback/Archive] DNS Response Size started with
Read the rest of this entry »
Posted in Communications Development, Development, DNS, Internet, Internet protocol suite, IPv4, IPv6, Power User, TCP, tcpdump, UDP, Wireshark | Leave a Comment »
Posted by jpluimers on 2021/11/10
From a while back, but still relevant when you learn all your life:
[Archive.is] 🔎Julia Evans🔍 on Twitter: “ten questions about UDP: “
[WayBack] UDP questions
Hello! Here are some questions & answers. The goal isn’t to get all the questions “right”. Instead, the goal is to learn something! If you find a topic you’re interested in learning more about, I’d encourage you to look it up and learn more
–jeroen
Read the rest of this entry »
Posted in Communications Development, Development, Internet protocol suite, Software Development, UDP | Leave a Comment »
Posted by jpluimers on 2020/08/20
Today it’s the 40th birthday of UDP. Or more precise: 40 years after [WayBack] RFC 768 – User Datagram Protocol got submitted.
It is still used a lot today, so be sure to read more background on [WayBack]Â User Datagram Protocol – Wikipedia.
And of course on a birthday, it is nice to have few good jokes. So here we go:
[WayBack]Â “I would tell you a joke about UDP, but you probably wouldn’t get it.” | Hacker News
[WayBack] I would tell you a joke about UDP, but you probably wouldn’t get it. So here’s a TCP joke | reddit.
[Archive.is]:
- UDP packet bar walks into
- The best thing about UDP jokes is that I don’t care if you get it. #sysadmin #networking #IT
You can generate more yourself:Â udpjoke.py
–jeroen
Read the rest of this entry »
Posted in Communications Development, Conference Topics, Conferences, Development, Event, History, Internet protocol suite, UDP | Leave a Comment »