Category: networking

Freetz Alternative Firmware for Older FritzBoxes

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 […]


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: […]

the second nftables howto – it is fast and …… complicated

firewall & pinguin: iptables where do thou go? it is said that when using “ip-sets” iptables and nftables achieve almost same performance (amounts of ips possible to block, without server becoming slow/unresponsive) Redhat and nftables on DDoS “so the only […]

FREIES WLAN FÜR AALE (und die anderen Fische auch)

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 […]

quantum computing and a universe wide wireless communication network faster than the speed of light

Why is quantum computing important: optimization Update: Google claims to have reached quantum supremacy The tech giant unveiled its x-quantum computer chip Bristlecone in March 2018 (src: cnet) original nasa paper: book: Scott’s Supreme Quantum Supremacy FAQ! […]

ntpd – when fundamentals fail

servers/clients/computers/programs/services/webservers need accurate time… they usually get it from time servers that have an atomic clock attached to their USB port. (just guessing) ping PING ( 56(84) bytes of data. 64 bytes from ( icmp_seq=1 ttl=46 time=43.5 […]

a pretty good ipv6 introduction – ipv4 depletion

IPv6: Introduction it’s the year 2019, roughly 14% of the web is running ipv6. you can watch real time statistics here: (i have no clue how accurate the data is, how they are generated) … but it seems there […]

lnav – like less but more colorful output of log files

CentOS8: ccze author not willing to maintain ccze. no ccze and not even lnav available. how to monitor all logs… as i was wondering what combination of less -R with or without ccze would allow me to view log […]

Monitoring Performance of Linux Servers

monitor (andoird) devices with bpf: so guess “monitoring” is about two things: availability and performance: detect performance bottlenecks get informed if parts (harddisks) / servers have failed / are about to fail security: detect, report and (if possible) automatically […]