[Wayback/Archive] RubyConf Mini 2022: Keynote: Learning DNS by Julia Evans – YouTube
Via [Wayback/Archive] 🔎Julia Evans🔍 on Twitter: “Just noticed that the recording of my keynote “Learning DNS in 10 Years” from @RubyConfMini is up!”
–jeroen
Archive for the ‘UDP’ Category
RubyConf Mini 2022: Keynote: Learning DNS by Julia Evans – YouTube
Posted by jpluimers on 2026/06/18
Posted in Communications Development, Development, DNS, Internet, Internet protocol suite, Power User, Software Development, TCP, UDP | Leave a Comment »
A few pfSense quirks I got used to over the years
Posted by jpluimers on 2026/01/06
Everytime when installing a pfSense router from scratch, I seem to re-learn a few of the below quirks. So it was finally time to document them (:
Quite a few of my pfSense configurations are just doing routing between various networks, should not provide DHCP leases and do not always need or have a WAN connected (i.e. they are LAN-only).
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Posted in Communications Development, Conference Topics, Conferences, Cyberchef, Development, DHCP, Encoding, Event, Hardware, HTTP, Internet protocol suite, MikroTik, Network-and-equipment, pfSense, Power User, routers, Software Development, SSH, TCP, TLS, UDP | Tagged: 8846 | Leave a Comment »
Bufferbloat, The Internet, And How To Fix It | Hackaday
Posted by jpluimers on 2025/12/26
Anxious to see how many routers have improved their algorithms to prevent Bufferfloat.
[Wayback/Archive] Bufferbloat, The Internet, And How To Fix It | Hackaday
The following YouTube videos in it are embedded below the blog signature:
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Posted in Development, Power User, LifeHacker, Network-and-equipment, Communications Development, Internet protocol suite, TCP, routers, UDP | Tagged: bufferbloat, latency, jitter, WiFi, Linux, OpenWRT | Leave a Comment »
GL.iNet 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
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!):
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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 »
In case I need a small 5-port managed switch that can do port-mirroring: GS305E | Easy Smart Managed Essentials Switch | NETGEAR Support
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:
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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 »
Guess the maximum DNS Response Size… (by Jan Schaumann)
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
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Posted in Communications Development, Development, DNS, Internet, Internet protocol suite, IPv4, IPv6, Power User, TCP, tcpdump, UDP, Wireshark | Leave a Comment »
🔎Julia Evans🔍 on Twitter: “ten questions about UDP”
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: “
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
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Posted in Communications Development, Development, Internet protocol suite, Software Development, UDP | Leave a Comment »
Most network protocols are TCP based, so be aware ping uses ICMP and traceroute UDP
Posted by jpluimers on 2021/09/08
Interesting thread: [WayBack] SwiftOnSecurity sur Twitter : “I had this issue in my prev company network. QoS will drop ICMP and you’ll chase your tail. If you want to find out if a network service works, test the service. If you want to know if TCP works, use TCP.… “
So:
tcppingandtcptraceroutefor the win!- remember that some protocols, rely on ICMP or UDP, so ensure these work on your network tool (do not QoC them away!)
[WayBack] Zimmie on Twitter: “It is perhaps worth noting: traceroute does not generally use ICMP. Instead, it uses this horrific UDP port range with a different port for every probe at every hop. 30 hops? That’s 90 different UDP ports you just tried. Makes its value questionable at the best of times.…”
Related:
- [WayBack] tcptraceroute(1) – Linux man page
- [WayBack] traceroute(8) – Linux man page
- [WayBack] ping(8) – Linux man page
- [WayBack] tcpping/tcpping at master · deajan/tcpping · GitHub
–jeroen
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Posted in *nix, *nix-tools, Communications Development, Development, Power User, TCP, UDP | Leave a Comment »
Happy birthday UDP!
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
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Posted in Communications Development, Conference Topics, Conferences, Development, Event, History, Internet protocol suite, UDP | Leave a Comment »
The Wiert Corner - irregular stream of stuff 