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How to setup a Raspberry Pi Cluster with k3s and rancher You have one or more Raspberry Pi 4 1 Install Raspberry Pi OS Lite (64 Bit) with the Raspberry Pi Imag...

Raspberry Pi * RaspberryZeroUsbDongle * RaspberryNtpServer2021 * RaspberryGpsNtpServer * GpsHeadFlorianTaeger * RaspberryPiCluster

Netflow Analyse and Netflow for IDS * Argus (open) * SiLK (open) * Arbor Peakflow X / Pravail NSI (commercial) * YAF * iSiLK * Bro * Lancope ...

Netflow * NetflowAnalyse contains following information: 1 Source IP address 1 Destination IP address 1 Source port for UDP or TCP, 0 for other protocol...

(This is a Wiki, feel free to add or edit content; you just need to register.) This is disabled at the moment cause of maintainance, but will be enabled soon. Tag...

IT Security in a nutshell Through my long career as a security professional, i am still annoyed how complex and inefficient IT Security most of the time is. You h...

NIST Cybersecurity Framework This is here for referential purpose only. Whenever you need information about the NIST CSF, go to the original source! Though the Cy...

Asset Management (ID.AM) NIST CSF The data, personnel, devices, systems, and facilities that enable the organization to achieve business purposes are identified ...

(Cisco) Firewall Best Practices auf deutsch Das GUI als auch die CLI sollen gleichwertig benutzbar sein. Features, die den jeweils anderen Weg behindern sind zu v...

Security $ "A designer knows he has achieved perfection not when there is nothing left to add, but when there is nothing left to take away.": Antoine de Saint Ex...

List of IP Address Management tools (IPAM) and DNS DHCP IPAM (DDI) List of IPAM at Wikipedia commercial * QIP * Infoblox http://www.infoblox.de/de/product...

ansible configuration management Installation View installation instructions First Steps # ansible version ansible 1.6.6 Add some host to /etc/ansible/hosts a...

How to sort IPs with gnu sort sort n t . k 1,1 k 2,2 k 3,3 k 4,4 /verbatim

Here documents or heredoc Multi line message using cat #!/bin/sh cat Multi line message using cat, with tabs suppressed #!/bin/sh cat Multi line message usi...

Installation packages needed in pkgsrc How to install a usable latex with pkgsrc Install: * print/xetex * print/tex koma script * print/tex babel * p...

Raspberry Pi Zero USB Dongle How to setup a Raspberry Pi Zero as a easy to use Linux Accessory. Links: * https://www.youtube.com/watch?v=IR6sDcKo3V8 * http...

Wie man die Digitalisierung trotz Digitalministerium schaffen kann Ich meine mit Digitalisierung zunächst die Digitalisierung der internen Abläufe der Bundesbehör...

Problem with NTP queries from Windows as peer wir hatten letztens einen Ausfall in der AD, nachdem die Zeitserver (NTP1 NTP6) einen Patch bekommen haben. Der P...

Timeserver with ntp WORK IN PROGRESS * EnterpriseTimeServer * EasyDistributeAndBalanceWithPool * NtpLeapsecondFile * NtpVsPtp * MeinbergNtpConfig ...

ssh and ~/.ssh/config Work in progress * http://www.cyberciti.biz/faq/create ssh config file on linux unix/ * fefe about ssh * ssh best practice

Random Numbers Usefull tools * ent ent b file * rngtest cat /dev/hwrng rngtest c 1000 * dieharder cat /dev/hwrng dieharder d 0 vv * base58 ...

How to render large dot files * sfdp x Tpng decix.fw.dot o graph1.png * sfdp x Goverlap=scale Tpng decix.fw.dot o graph1.png * neato x Goverlap...

work in progress DDI Konzept Dies soll ein generisches DDI Konzept sein, das als Grundlage (Blaupause) dienen kann. Es soll exemplarisch die Stichpunkte liefern,...

Network Services * DhcpD * BinD9 * ProXy * NodeJs * IpAM IP Address Management or DDI if you integrate IpAM with DhcpD and BinD9 * NtP * DDIK...

Miscellaneous * ResetProximAP4000 How to reset an old access point * Fun A bit more complex 'hello world' in EVERY programming language you never heard of ...

Raspberry Pi 4 with NTP, PPS, GPS und Debian bullseye Work in progress * http://www.gregledet.net/computers/building a stratum 1 ntp server with a raspberry pi...

How to plot data from ntp with gnuplot Generate some simple data with a script ./ntplog.sh /tmp/ntp.log #!/bin/bash while true do echo n `date %s` ntpq p 1...

echo Print your PATH settings in human readable format on your Linux, macOS or Unix box: echo "${PATH//:/$'\n'}" See https://cyberciti.biz/faq/howto print path va...

Utilities * AwK * sed * HereDocuments * EchO * http://code.google.com/p/shellinabox/ * NmaP * RcFiles * fgres a search and replace tool ...

Links to Snowden Material (from and about) * https://github.com/iamcryptoki/snowden archive

ARM Workstation SolidRun * https://www.solid run.com/arm servers networking platforms/honeycomb workstation/ * https://developer.solid run.com/knowledge...

Linux * DebianShowInstalledPackage * PolicyBasedRouting * RedHat * ArmWorkstation

BananaPi NetBSD * https://wiki.netbsd.org/ports/evbarm/install_using_sysinst/ * Images

nmap Examples * nmap p80 Pn iL liste1.txt oG awk '/open/{print $2 " " $3}' * nmap p80 10.167.1.0/24 oG grep open * cat gscan.10.130.0.0 1...

Conexant http://www.conexant.com Hersteller von DSL , Modem , Video und Wireless Chipsätzen (nicht nur WLAN!), der im Februar 2004 mit GlobespanVirata fusioniert...

Get ride of Pocket in Firefox 1 Edit configuration about:config 2 change extensions.pocket.enabled to false * https://www.howtogeek.com/228863/how to rem...

How can i prevent the scrollbar to jump to the clicked location? 1 Edit configuration about:config 2 add ui.scrollToClick=0 (as Number not Boolean) * htt...

FuryBSD Aditional * https://blog.grem.de/pages/t470s.html * graphics/drm fbsd12.0 kmod from source (needs matching kernel) prime origins shells/bash sysut...

Sysadmin FreeBSD * FreeBSDAfterboot * FreeBSDexpl * SerialWithPcenginesAPU * jails * BootEnvironmentsOnFreeBSD * StaticLinkedPackages * Follo...

Information Security Management Systems (ISMS) * ISIS12 https://isis12.it sicherheitscluster.de * BSI Grundschutz * NIST SP800 171 * NIST Cybersecurit...

General Security Bookmarks * https://www.islegitsite.com URL Trust Checker * https://www.smashingsecurity.com Security Podcasts * https://thecyberwire.co...

Coding * MeteorNextBigThing

PXE Install FreeBSD on Soekris net5501 dhcp tftp zfs create o mountpoint=/tftpboot zroot/tftpboot sed i '/^#tftp /s/^#//' /etc/inetd.conf /etc/rc.conf: inetd_...

A v a d a c r a c k work in progress 1 open wp content/themes/Avada/includes/lib/inc/class fusion envato api.php 2 remove $response_code ...

Quick how to RancherOS and Rancher Waschzettel / blurb RancherOS is a very dockercentric linux OS. 1 boot iso 1 sudo passwd rancher 1 ssh rancher@ 1 ...

How to start a very simple webserver with buildin tools /usr/bin/python m SimpleHTTPServer 8000

Mac OS X * OSXSecuritY * OSXdmg2Iso * OSXchangeSshPort * OSXCalDAV * OSXBackupOpenDirectory * OSXeToken * OSXGPGKeychainCrash * OSXKeyboar...

Zero Trust Model Instead of traditional methods such as VPNs and login credentials to establish trust and verify identity, Google relies on a “tiered access” mode...

Security Models * castle, perimeter, wall, inside, outside * ZeroTrust, Kerberos, BeyondCorp, perimeter less

VirtualBoxGuest

Mac OS X Security * Using YubiKey as Smart Card * Smart Card only login * Serveral Login Features

xargs find . name "*.flac" xargs file xargs: unterminated quote find . name "*.flac" print0 xargs 0 file The print0 argument tells find to use the NULL c...

tcpdump tcpdump filter to match DHCP packets including a specific Client MAC Address: tcpdump i eth3 vvv s 1500 '((port 67 or port 68) and (udp 38:4 = 0x00cac...

Copyright This sysadmin.wiki by the contributing authors is licensed under a Creative Commons Attribution 4.0 Unported License.Permissions beyond the scope of thi...

No active remote repositories configured * https://stackoverflow.com/questions/40080493/no active remote repositories configured

Remove the schg flag Use chflags(1) to remove the schg flag. Some files of the base OS are protected by this flag. chflags R noschg /usr/bin

Wireless LAN (WLAN) Grundlagen zu Wireless LAN, Standards, Sicherheit, Technik, FAQ sowie alle Chipsätze und deren Treiber. Neben der Geschichte, Tips und HowTos...

GPIO on a Banana Pi M1 with FreeBSD $ Is there any GPIO on the hardware: dmesg grep gpio $ List available GPIO pins: gpioctl lv or gpioctl f /dev/gpioc1...

use GPIO with FReeBSD * BananaPiM1

ntpd build options working build options for BeagleBone Black with Linux beaglebone 3.8.13 bone70 ./configure ' prefix=/opt/ntp' ' enable all clocks' ' enable ...

Raspberry with a gps clock and a etc RTC * apt get install i2c tools * cat /etc/modules pps gpio * modprobe i2c bcm2708 * modprobe rtc ds1307 ...

Antenna cables * GPSANT https://www.meinberg.de/german/products/gps antenne konverter.htm * handelsüblichem Koaxialkabel (z.B. RG58) = 300m * Koaxi...

GPS head for raspberry pi form Florian Täger Kurz noch ein paar Hilfreiche Details: Das PPS Signal liegt an GPIO 23 an. Auf GPIO 24 liegt das FIX Signal. LED1 hä...

Format a USB stick with ufs * gpart show * gpart destroy F da0 * gpart create s gpt da0 * gpart add t freebsd ufs da0 * newfs /dev/da0p1 * mo...

reset password boot dka100.1.0.6.1 flags 0,1 System will be reset prior to boot. OpenVMS PALcode V1.88 27, Digital UNIX PALcode V1.83 22 FF.FE.FD.FC.FB.FA.F9....

OpenVMS * ResetPassword

FritzFon C5 and SpeedPort Hybrid Anmeldung an Basis 1, 2, 3 oder 4 gescheitert Registration to SpeedPort failed. * Login Menü Telefonie DECT Basisstation...

Fritzbox * Enable telnet * FritzFon C5 mit SpeedPort Hybrid Anmeldung an Basis 1, 2, 3 oder 4 gescheitert

Was muss man beim Aufbau eines Wireless LAN beachten? Generell ist es so, daß man ein FunkLAN testen muss theoretisch berechnen lässtsich eine Funkzelle kaum. A...

jekyll A static website generator. Create a new projekt jekyll new projektname Replace default template (minima) with your own template rm about.md index.md and...

Mac OS X Gatekeeper security sudo spctl master disable sudo spctl master enable sudo xattr rd com.apple.quarantine /Applications/LockedApp.app

How to put a FreeBSD laptop into sleepmode, suspend as root acpiconf s 3

Follow the quarterly or latest packages In file /etc/pkg/FreeBSD.conf use url: "pkg http://pkg.FreeBSD.org/${ABI}/latest", or url: "pkg http://pkg.FreeBSD.org...

FreeBSD Afterboot sshd.conf within bsdinstall shell! ssh ssh port allow root Some common best practice files create ~/CHANGES # logfile for every major...

X11 / xorg on FreeBSD * GermanKeyboard * SequenceToKillTheXserver * CorrectResolutioninVirtualBox * https://forums.freebsd.org/threads/various progra...

sequence to kill the X server Terminating Xorg with Ctrl Alt Backspace cat /usr/local/etc/X11/xorg.conf.d/keyboard zap.conf

German keyboard on Xorg cat /usr/local/etc/X11/xorg.conf.d/keyboard de.conf in my case FreeBSD as guest in VirtualBox on a Lenovo Thinkpad T460s

add user via batchfile adduser f user.list G wheel w no piest:2001:::::Stephan :: engk:2002:::::Engel:: grea:2003:::::Andreas:: tihar:2004:::::Tim:: seej:2005:...

!/bin/sh #export http_proxy=http://10.133.65.201:3128/ #export HTTP_PROXY=http://10.133.65.201:3128/ NTPBINURL=http://www.eecis.udel.edu/~ntp/ntp_spool/ntp4/ntp 4...

Ubuntu bind is compiled with built with ' prefix=/usr' ' mandir=/usr/share/man' ' infodir=/usr/share/info' ' sysconfdir=/etc/bind' ' localstatedir=/var' ' enable ...

ISC bind 9 * LogginG * CachingOnly (proxy i.e. forwarder) * DetectDomainGenerationAlgorithm * InternalRootServer * QueryBindVersion * DNSControl...

# bind soll konfig neu laden rndc reload # virtuelle Fenster aufmachen screen CTRL A A zusaetzliches Fenster aufmachen CTRL A SPACE zwischen den Fenstern wechseln...

Unsorted examples * UbuntuExpl

Headline What is the best way to remove all packages and start over? 1 Update the ports tree. 2 Run pkg_delete pkg_delete a 3 Back up /usr/local/etc/ ...

Review the post install message Sometimes you miss something in the post install message, after installing a package. pkg install cde Review the post install mess...

Correct resolution in VirtualBox I have to set the correct resolution in the config. I was fixed to a 640x480 resolution. With xrandr i can view the possible reso...

FreeBSD as VirtualBox guest 1 pkg install virtualbox ose additions 1 add this to /etc/rc.conf vboxguest_enable="YES" vboxservice_enable="YES"

How to keep your packages up to date * cvs d $CVSROOT checkout r pkgsrc 2019Q1 P pkgsrc * pkg_chk u k * pkg_rolling replace rsuvX bmake,bootstrap ...

continuous grep How to grep continuously in a logfile tail f file grep line buffered pattern

How to access packages or updates through a proxy setenv HTTP_PROXY http://10.130.65.2:3128/ setenv HTTPS_PROXY https://10.130.65.2:3128/ cvs q z2 " d:pserver;p...

Static linked packages ad this to the port's Makefile MAKE_ARGS = STATIC=1

FreeBSD example commands Work in Progress tmux virtual terminal similar to screen tmux ctrl b d tmux a ctrl b c ctrl b n https://tmuxcheatsheet.com Temperatur...

ntp example config # # $FreeBSD: stable/12/usr.sbin/ntp/ntpd/ntp.conf 337649 2018 08 11 17:42:42Z brd $ # # Default NTP servers for the FreeBSD operating system. ...

# Example /opt/pkg/etc/mk.conf file produced by bootstrap pkgsrc # Donnerstag, 16. Januar 2014, 22:08:52 Uhr CET .ifdef BSD_PKG_MK # begin pkgsrc settings P...

How to setup Mac OS X Terminal * Make sure you choose xterm not vt100 in Profiles Advanced Terminfo display colors * Disable Allow Mouse Reporting in Me...

99 Bottles of Beer $ This Website holds a collection of the Song 99 Bottles of Beer programmed in 1500 different programming languages: http://www.99 bottles o...

Howto reset a Proxim AccessPoint 4000 Orinico 1 Switch on 2 push reset for 13 seconds (not too much longer) 3 If you have a DHCP Server the AP will fetch...

Oracle Solaris 10 * AfterbootSolaris * SolarisAtStrato * EncryptFiles * SolarisBlogroll * ChangeHostnameOrIP * SolarisAuthViaTacacs * UpdateW...

multitail The program multitail lets you view one or multiple files like the original tail program. multitail ci green httpd access.log ci yellow I httpd...