Category: networking

methods for detecting network loops -> Realtek Remote Control Protocol – Loop Detect Packet – absolutley nothing wrong with it. (src) also interesting that HP switches are using a Cisco MAC address?

it’s a solid high quality USB WIFI dongle stick known as Edimax N300 Edimax is a company located in Taiwan and is said to support Open Source software (still needs to be confirmed) Edimax USB WIFI dongles are known to […]

software minimalism is key for stability, maintainability, security and performance so regularly check, what services are running and if they can be disabled/uninstalled 🙂 systemd: systemctl.man.txt # list all units (list can be /searched like less) systemctl # list all […]

currently wrestling with a LTE modem, that used to work under Ubuntu, but refuses to work under Debian 11. while true; do echo “=== show modem status:”; mmcli -m 1|grep -e model -e primary -e state -e signal; echo -e […]

this is a quick bash hack, to set overwrite the current ip with an fixed ip or add an virtual interface for an additional fixed ip this will (brute force) OVERWRITE all mess done by network managers of various origins […]

0) for security: keep all internet connected devices as up to date as possible! “Freifunk updates its router firmware and closes a critical security vulnerability that could allow attackers to install their own firmware on the devices” (src: heise.de) Also […]

with virt-manager, it is a breeze to select the PCI device (in this case enp3s0 NIC) for pass through to guest vm, in case the vm shall get it’s very own dedicated nic: notice: the passed NIC dissapears from the […]

and: is the EU / Germany location simply unattractive for many companies in view of the data protection craze? “In the end, it may be bitter for Quad9 that they only got into the trouble by moving to Europe, where […]

the specs CPU Allwinner A20,32 Bit Cortex™-A7 2-Core 1G GPU ARM® Mali400MP2 -> get the GPU going SDRAM 1GB DDR3 (shared with GPU) 432Mhz Storage “SD Card up to 64GB (SDXC) 1 SATA up to 2TB “ Network 4x Gigabit […]

the most fundamental networking settings are ever changing it used to be /etc/resolv.conf where nameservers are set systemd is doing it’s own thing /etc/systemd/resolved.conf and Ubuntu (based on Debian) is doing (again) it’s entirely own thing (netplan) frankly: this sucks […]

nfs is to GNU-Linux what smb is to Windows: sharing dirs & files “The Network File System (NFS) was developed to allow machines to mount a disk partition on a remote machine as if it were a local disk. It […]

remember that discussion about ever changing non-standard ways of defining network interfaces and ip addresses under /etc/network… well guess what, canonical just came up with a completely new config file format X-D (guess, everything is a yaml.yml now) hostnamectl; # […]

update: join me @ online-coworking-space.com https://play.workadventu.re/@/online/coworking/space.com first of: the online conferecing as RPG game format is really fun and innovative idea to make online events more fun! 🙂 (it is accompanied by live streams via vimeo or youtube) Corona will […]

can not recommend! the connection works (benchmark results below) the major problem is: unable to disable DHCP! which means: whenever there is a disconnect from the uplink (DHCP lost) the DHCP of the TL-WPA4220KIT will “kick in” and assign completely […]

update: Starlink reduced price to 80EUR! 😀 PLUS: THE HARDWARE IS FOR FREE! (the very good hardware alone is worth ~2000USD!) Thanks Elon! 😀 Support SpaceX: mankind’s only hope to ever reach Mars! order Starlink now!     Update: Amazon […]

always say something positive first: FritzBoxes are great (DSL/LTE/…) internet routers (up to now) all FritzBoxes work with 12V DC (which is great for usage with small solar power stations (that are usually 12V based)) high quality & reliable secure […]

https://www.mediatek.com/products/broadbandWifi/mt7662u hostnamectl; # tested on Static hostname: lenovo t440 Operating System: Debian GNU/Linux 10 (buster) Kernel: Linux 4.19.0-14-amd64 Architecture: x86-64 # it works with # install drivers su – root apt update apt install firmware-misc-nonfree apt install firmware-ralink # after […]

this script is for cront-job regular measurement of the available (download) bandwidth, by downloading a 100MByte dd crated (https://dwaves.de/testfile) testfile created like this (creditz): head -c 100m /dev/zero | openssl enc -aes-128-cbc -pass pass:”$(head -c 20 /dev/urandom | base64)” > […]

DNS servers are the “yellow pages” “phone book” of the internet. whoever is running DNS servers get’s to know all queries send (what client is requesting and probably connecting to what address… basically: what websites the user have visited, this […]

Overview Recent 360Netlab unknown threat detection system to capture to a group of unknown malicious families of the sample, which a number of samples supported CPU architectures are x86(32/64), ARM(32/64), MIPS(MIPS32/MIPS-III) as well as PPC, after our analysis, which is […]

  “Better Than Nothing” Starlink-Beta started across the US & Canada Starlink: amazing but and also a bit “crazy” “On 15 October 2019, the United States Federal Communications Commission submitted filings to the International Telecommunication Union on SpaceX’s behalf to […]

Connection refused nothing has changed on server or client side so was the server hacked? NO! the solution is way more simple: the guest wifi might block ssh traffic give it a try: if not even telnet can get at […]

JavaScript can compromise the user’s network devices! pretty evil are devices/routers with security problems, that can be exploited from javascript. so basically opening a webpage with a browser that has javascript enabled (which most browsers have) might scan the user’s […]

the idea is: ssh is running on 22 what if user can connect localport 2222<->22 and user can then connect to localport:2222 and it will be forwarded to localport:22? and YES IT IS POSSIBLE 🙂 which the massively complex socat: […]

this age of mass surveillance… … who is observing “the observers”? guess with it-security and internet-security (internet = roads, cars = computers that users use every day) it is like with real-life-security – there is no 100% security. all users […]

it is nice to get an graphical overview what wifi wlan networks access points one is surrounded by. also good to know what direction to point antenna/laptop to have best reception. because this allows to fine-tune what channel best to […]

scroll down and behave! (slaves of digital dictatorships) short version summary of 1984: short version: 1984 needs to be avoided at any cost. because: it is evil. (Google did not drop it’s motto “don’t be evil” for nothing) in essence: […]

hostnamectl; # tested on Icon name: computer-desktop Chassis: desktop Operating System: Debian GNU/Linux 10 (buster) Kernel: Linux 4.19.0-8-amd64 Architecture: x86-64 su – root; # become root apt update apt install rfkill rfkill list all 0: phy0: Wireless LAN Soft blocked: […]

firewall & the GNU-Linux Pinguin: firewalls: where do thy go? and does thee protect from DDoS? as always in software development and as always in GNU Linux, there is not “one” firewall system, no, there are many and it is […]

wishes for next year: free wifi for eels (and other creatures) Why does EVERYONE have to run their own WIFI / pay their OWN internet access? When it would be enough to have one fast internet access plus 2-3x WIFI […]