Did you know the command traceroute is sending "SUPERMAN" as data in the UDP packet?

The other day was learning about the difference between tracert and traceroute, and noticed that when sniffing.

Couldn't find anything online but the source code (added in comment) of where it sens SUPERMAN.

#Wireshark #traceroute #udp #linux #SUPERMAN #networking #ICMP

@catsalad

I explained the joke to daughter. To demonstrate she understood, she gives me an example of real life #UDP :

the Golden Records onboard #NASA 's #Voyager missions.

We don't know if it'll be received, or when, or even if it'll be understood.

#ProudDaddy #GeekDaddy

#GoldenRecord #Joke #Geek #Astrodon #Network #Protocol

#dnsperf v2.13.1 released!
- fixes to in-progress queries
- fixes to TCP module
- fix to stream binary format input
#DNS #performance #testing #UDP #TCP #DOT #DOH #opensource
https://github.com/DNS-OARC/dnsperf/releases/tag/v2.13.1

I did a quick little screen cast about how to create a #UDP server inside a web page. Our #P2P protocol uses this module, which is how we can create a p2p environment that runs on mobile, desktop, or even heedlessly in the terminal all with a single codebase.

https://www.youtube.com/watch?v=6pZ8vjpYj4E

Interesting:

»Each copy of an app using the core #Veilid library acts as a network node […] There are no special nodes, and there's no single point of failure. The project supports #Linux, macOS, Windows, Android, iOS, and web apps.

Veilid can talk over #UDP and #TCP, and connections are authenticated, timestamped, strongly end-to-end encrypted, and digitally signed to prevent eavesdropping, tampering, and impersonation.«

https://www.theregister.com/2023/08/12/veilid_privacy_data/

Entendiendo la red: topologías, protocolos y comandos de ejemplo para diagnosticar problemas básicos

#ARP #Blog #Consola #DHCP #DNS #dsniff #ICMP #IP #namp #Network #ssh #SysAdmin #TCP #tcpdump #Terminal #traceroute #tshark #tty #UDP

https://osiux.com/entendiendo-la-red.html

No matter how awkward you feel when you hear about #UDP #syslog in the age of encrypted TCP connections, UDP syslog is here to stay. The good news is that high performance UDP log collection is now part of #syslog_ng 4.2.0.

https://www.syslog-ng.com/community/b/blog/posts/syslog-ng-4-2-extra-udp-performance

#LogManagement

Ah ha, that's a "feature". 🙄

To sync folders with #QEMU/#KVM and #Vagrant, you need to use #Linux #NFS file sharing, which means installing an NFS server on your machine. Easy enough. And depending on the age of the #VM, you may need to enable #UDP support in your host machine.

🎉

Today, there are many E2E communication services on the market. These services are claimed to be secure through encryption and other means.

Are these really so?
Is it really end-to-end communication?
Does encryption really prevent information leakage?

Only a few people in the world understand the meaning of these questions.

#informationtheory #telecom #ict
#onetimepad #entropy #infosec #cryptography
#internetprotocol #tcp #udp #web3 #defense #cybersecurity #ddosattacks #ciso #e2e

Some very useful advice about #UDP #syslog from @bazsi, original author of syslog-ng:

https://axoflow.com/syslog-over-udp-kernel-syslog-ng-tuning-avoid-losing-messages/

Escucha el pódcast: “Por primera vez que la opción gobierno autoritario supera a quienes creen en la #democracia”- Claudio Fuentes sobre estudio del Laboratorio Constitucional de la #UDP en #AlPanPan con Mirna Schindler

Comment utiliser le protocole de transmission. à faible latence #srt pour transmettre de la vidéo via une connexion 4G/LTE plutôt moyenne ayant de la perte importante sachant que le transfert est fait en #udp ? Après un certain temps à chercher, je décide de forcer le TTL de l'émission vidéo à 254 au lien de 64. Et en allongeant la durée de vie de paquets cela a solutionné mes problèmes d'artéfacts vidéo, sans rien changer à la latence.😄
https://fr.wikipedia.org/wiki/Time_to_Live

I2S Microfon und 3W Class D Verstärker #INMP441 #MAX98357 - mal schauen ob man daraus ein #UDP #Intercom bauen kann

Bash тоже умеет слать данные по TCP и UDP. Я этим пользовался, когда писал сетевые тесты.

Например, вот так можно послать минимальный валидный HTTP GET запрос:

echo -e 'GET /maintenance/start HTTP/1.0\r\n\r\n' > /dev/tcp/127.0.0.1/80

А вот так можно отправить Standart query на Google Public DNS:

echo -e '\x00\x01\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00\x03www\x06google\x03com\x00\x00\x01\x00\x01' > /dev/udp/8.8.8.8/53

При этом если IP-адрес не существует или не отвечает, то в случае с TCP, bash будет где-то минуту пытаться подключиться (слать SYN-пакеты) прежде чем вернёт ошибку. А в случае с UDP, bash просто пошлёт данные в никуда и не вернёт никакой ошибки.

К сожалению, получить ответ на посланные данные нельзя :(. Но можно прочитать из сокета данные. Например, вот так можно узнать, что нам скажет GitHub.com с SSH порта:

cat < /dev/tcp/github.com/22

Через некоторое время в терминале выведется "SSH-2.0-babeld-077acb5b" и bash продолжит ждать следующие данные, пока сокет не будет закрыт с той стороны.

А вот открывать сокет на слушание - bash уже не умеет. И вот это жаль, конечно.

#linux #unix #bash #net #tcp #udp #testing #dev

#TCP vs. #UDP

#network #networking #ccna #ccnp #ccie #cisco #sysadmin #networkadmin #networkadministrator #protocol #traffic #data

Thank you to our Emperor #Network Partner #Sponsor, #AARNet for our delicious packets and pipes!

We couldn't deliver #EverythingOpen without you!

(We'd make a #UDP joke ... but you might not get it 🥁✨)

https://aarnet.edu.au

https://betterprogramming.pub/why-i-will-never-use-alpine-linux-ever-again-a324fd0cbfd6

Smarter Every Day.

Ich habe nicht gewusst dass #Alpine ein inhärentes Problem mit #DNS hat, und dass die einzige Lösung dafür ist ein anderes BaseImage zu verwenden.

#Docker #Container #DNSoverTCP #UDP

NetDiscovery - Simple C# #UDP network #discovery

https://github.com/na-stewart/NetDiscovery

Reverse Engineering A Mysterious UDP Stream in My Hotel https://www.gkbrk.com/2016/05/hotel-music/ #UDP #Networking #Wireshark

My usecase is a local network - I'm going with 64kb because it's all the memory I'll ever need. #udp