AVR-RS485, Sample code to use half-duplex 2wire RS485 with Atmel AVR and a RS485 driver.
Category Archives: Uncategorized
Free SSL Certificate / Zertifikat
Let’s Encrypt
Let’s Encrypt Glossar
ZeroSSL – FREE SSL Certificate Wizard
Wie Sie ein Let’s Encrypt Zertifikat erstellen und in ein Webhosting-Produkt einbinden
Web-Server
How to Secure Apache with SSL and Let’s Encrypt in FreeBSD
NameBasedSSLVHosts
NameBasedSSLVHostsWithSNI
Mail-Server
Certbot: Let’s Encrypt TLS-Zertifikate für Mailserver (Deprecated!)
Wildcard
Generate Wildcard SSL certificate using Let’s Encrypt/Certbot
Wildcard Domain Step-By-Step
ACME v2 Production Environment & Wildcards
Weiterleitung
Weiterleitung auf HTTPS einrichten
Apache2 http zu https Umleitung
QuickTipp: Weiterleitung (redirect) von HTTP auf HTTPS via Apache oder Htaccess
Multiple SSL Certificates with One IP Address
Server Name Indication (SNI)
Using Multiple SSL Certificates in Apache with One IP Address
Apache SNI Browser Support
Multi-Domain (SAN) Certificates – Using Subject Alternative Names
Was ist Server Name Indication (SNI)?
SSL vs. TLS – Worin bestehen die Unterschiede?
SNI (Server Name Indication)
pf
py36-certbot
# pkg install py36-certbot
Updating FreeBSD repository catalogue...
FreeBSD repository is up to date.
All repositories are up to date.
The following 24 package(s) will be affected (of 0 checked):
New packages to be INSTALLED:
py36-certbot: 0.35.1,1
py36-openssl: 19.0.0
py36-cryptography: 2.6.1
py36-six: 1.12.0
py36-cffi: 1.12.3
py36-pycparser: 2.19
py36-asn1crypto: 0.24.0
py36-josepy: 1.2.0
py36-acme: 0.35.1,1
py36-requests-toolbelt: 0.8.0
py36-requests: 2.21.0
py36-chardet: 3.0.4_1
py36-certifi: 2019.6.16
py36-urllib3: 1.22,1
py36-pysocks: 1.7.0
py36-idna: 2.8
py36-pytz: 2019.1,1
py36-pyrfc3339: 1.1
py36-zope.interface: 4.6.0
py36-zope.component: 4.2.2
py36-zope.event: 4.1.0
py36-parsedatetime: 2.4_1
py36-configobj: 5.0.6_1
py36-configargparse: 0.14.0
Number of packages to be installed: 24
The process will require 27 MiB more space.
7 MiB to be downloaded.
Proceed with this action? [y/N]: y
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[24/24] Fetching py36-configargparse-0.14.0.txz: 100% 24 KiB 24.5kB/s 00:01
Checking integrity... done (0 conflicting)
[1/24] Installing py36-pycparser-2.19...
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[4/24] Extracting py36-asn1crypto-0.24.0: 100%
[5/24] Installing py36-cryptography-2.6.1...
[5/24] Extracting py36-cryptography-2.6.1: 100%
[6/24] Installing py36-openssl-19.0.0...
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[7/24] Installing py36-pysocks-1.7.0...
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[8/24] Installing py36-idna-2.8...
[8/24] Extracting py36-idna-2.8: 100%
[9/24] Installing py36-chardet-3.0.4_1...
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[10/24] Installing py36-certifi-2019.6.16...
[10/24] Extracting py36-certifi-2019.6.16: 100%
[11/24] Installing py36-urllib3-1.22,1...
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[12/24] Installing py36-requests-2.21.0...
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[13/24] Installing py36-pytz-2019.1,1...
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[15/24] Installing py36-requests-toolbelt-0.8.0...
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[16/24] Installing py36-pyrfc3339-1.1...
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[17/24] Installing py36-zope.interface-4.6.0...
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[18/24] Installing py36-zope.event-4.1.0...
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[19/24] Installing py36-acme-0.35.1,1...
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[20/24] Installing py36-zope.component-4.2.2...
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[24/24] Installing py36-certbot-0.35.1,1...
[24/24] Extracting py36-certbot-0.35.1,1: 100%
Message from py36-urllib3-1.22,1:
Be careful, support of IPv6 is broken with PySocks 1.5.7.
Message from py36-certbot-0.35.1,1:
===========================================================================
This port installs the "standalone" client only, which does not use and
is not the certbot-auto bootstrap/wrapper script.
The simplest form of usage to obtain certificates is:
# sudo certbot certonly --standalone -d <domain>, [domain2, ... domainN]>
NOTE:
The client requires the ability to bind on TCP port 80 or 443 (depending
on the --preferred-challenges option used). If a server is running on that
port, it will need to be temporarily stopped so that the standalone server
can listen on that port to complete the challenge authentication process.
For more information on the 'standalone' mode, see:
https://certbot.eff.org/docs/using.html#standalone
The certbot plugins to support apache and nginx certificate installation
will be made available in the following ports:
* Apache plugin: security/py-certbot-apache
* Nginx plugin: security/py-certbot-nginx
===========================================================================
# certbot certificates
Saving debug log to /var/log/letsencrypt/letsencrypt.log
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
No certs found.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# certbot certificates
Saving debug log to /var/log/letsencrypt/letsencrypt.log
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Found the following certs:
Certificate Name: ns3.te-clan.ch
Domains: ns3.te-clan.ch
Expiry Date: 2019-11-17 07:43:26+00:00 (VALID: 89 days)
Certificate Path: /usr/local/etc/letsencrypt/live/ns3.te-clan.ch/fullchain.pem
Private Key Path: /usr/local/etc/letsencrypt/live/ns3.te-clan.ch/privkey.pem
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# certbot certonly --standalone -d XXX Saving debug log to /var/log/letsencrypt/letsencrypt.log Plugins selected: Authenticator standalone, Installer None Enter email address (used for urgent renewal and security notices) (Enter 'c' to cancel): XXX - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Please read the Terms of Service at https://letsencrypt.org/documents/LE-SA-v1.2-November-15-2017.pdf. You must agree in order to register with the ACME server at https://acme-v02.api.letsencrypt.org/directory - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - (A)gree/(C)ancel: a - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Would you be willing to share your email address with the Electronic Frontier Foundation, a founding partner of the Let's Encrypt project and the non-profit organization that develops Certbot? We'd like to send you email about our work encrypting the web, EFF news, campaigns, and ways to support digital freedom. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - (Y)es/(N)o: y Obtaining a new certificate Performing the following challenges: http-01 challenge for ns3.te-clan.ch Waiting for verification... Challenge failed for domain ns3.te-clan.ch http-01 challenge for ns3.te-clan.ch Cleaning up challenges Some challenges have failed. IMPORTANT NOTES: - The following errors were reported by the server: Domain: ns3.te-clan.ch Type: connection Detail: dns :: DNS problem: NXDOMAIN looking up A for ns3.te-clan.ch To fix these errors, please make sure that your domain name was entered correctly and the DNS A/AAAA record(s) for that domain contain(s) the right IP address. Additionally, please check that your computer has a publicly routable IP address and that no firewalls are preventing the server from communicating with the client. If you're using the webroot plugin, you should also verify that you are serving files from the webroot path you provided. - Your account credentials have been saved in your Certbot configuration directory at /usr/local/etc/letsencrypt. You should make a secure backup of this folder now. This configuration directory will also contain certificates and private keys obtained by Certbot so making regular backups of this folder is ideal. # ping ns3.te-clan.ch ping: cannot resolve ns3.te-clan.ch: Unknown host ### DNS CONFIG ### # ping ns3.te-clan.ch PING ns3.te-clan.ch (185.72.247.169): 56 data bytes 64 bytes from 185.72.247.169: icmp_seq=0 ttl=64 time=0.162 ms 64 bytes from 185.72.247.169: icmp_seq=1 ttl=64 time=0.159 ms # certbot certonly --standalone -d ns3.te-clan.ch Saving debug log to /var/log/letsencrypt/letsencrypt.log Plugins selected: Authenticator standalone, Installer None Obtaining a new certificate Performing the following challenges: http-01 challenge for ns3.te-clan.ch Waiting for verification... Cleaning up challenges IMPORTANT NOTES: - Congratulations! Your certificate and chain have been saved at: /usr/local/etc/letsencrypt/live/ns3.te-clan.ch/fullchain.pem Your key file has been saved at: /usr/local/etc/letsencrypt/live/ns3.te-clan.ch/privkey.pem Your cert will expire on 2019-11-17. To obtain a new or tweaked version of this certificate in the future, simply run certbot again. To non-interactively renew *all* of your certificates, run "certbot renew" - If you like Certbot, please consider supporting our work by: Donating to ISRG / Let's Encrypt: https://letsencrypt.org/donate Donating to EFF: https://eff.org/donate-le
# service apache24 stop Stopping apache24. Waiting for PIDS: 46220. # certbot renew Saving debug log to /var/log/letsencrypt/letsencrypt.log - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Processing /usr/local/etc/letsencrypt/renewal/ns3.te-clan.ch.conf - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Cert is due for renewal, auto-renewing... Plugins selected: Authenticator standalone, Installer None Renewing an existing certificate Performing the following challenges: http-01 challenge for ns3.te-clan.ch Waiting for verification... Cleaning up challenges - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - new certificate deployed without reload, fullchain is /usr/local/etc/letsencrypt/live/ns3.te-clan.ch/fullchain.pem - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Congratulations, all renewals succeeded. The following certs have been renewed: /usr/local/etc/letsencrypt/live/ns3.te-clan.ch/fullchain.pem (success) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
$ certbot certonly --server https://acme-v02.api.letsencrypt.org/directory --manual --preferred-challenges dns -d 'domain.XXX,*.domain.XXX'
named_update
#!/usr/bin/env perl
use warnings;
use strict;
my $name = "test";
my $num_args = $#ARGV + 1;
if ($num_args != 3) {
print "\nUsage: $0 <domain> <TXT1> <TXT2>\n";
exit;
}
my ($domain, $txt1, $txt2) = @ARGV;
my @txt = ($txt1, $txt2);
my $dir = '/var/named/etc/namedb/master/';
my $filename = $dir . 'db.' . $domain;
print("${filename}:\n");
open(my $rd, "<", $filename) or die "Could not open file '$filename'";
my @lines = <$rd>;
close($rd);
open(my $wr, ">", $filename);
my $challenge = 0;
my $challenge_line = 0;
foreach my $i (0 .. $#lines) {
my $line = $lines[$i];
# overwrite the 1. and 2. line after the challenge
if ($challenge == 1 && $challenge_line > ($i - 3)) {
$wr->print("@ TXT \"" . $txt[$i - $challenge_line - 1] . "\"\n");
} else {
$wr->print($line);
}
# detect challenge
if ($line =~ /\_acme-challenge/) {
$challenge = 1;
$challenge_line = $i;
print("Found challenge!\n");
}
}
close($wr);
print("Kill named\n");
my $out = `pkill named`;
print($out);
sleep(2);
print("Start named\n");
$out = `service named start`;
print($out);
FreeBSD 12 & BIND 914
FreeBSD: Install an authoritative DNS server (BIND) (with DNSSEC)
pkg install bind914
Updating FreeBSD repository catalogue...
FreeBSD repository is up to date.
All repositories are up to date.
The following 13 package(s) will be affected (of 0 checked):
New packages to be INSTALLED:
bind914: 9.14.3
libxml2: 2.9.9
libidn2: 2.2.0
libunistring: 0.9.10_1
bind-tools: 9.14.3
python36: 3.6.9
readline: 8.0.0
libffi: 3.2.1_3
py36-ply: 3.11
py36-setuptools: 41.0.1
libedit: 3.1.20190324,1
json-c: 0.13.1
lmdb: 0.9.23,1
[...]
Message from python36-3.6.9:
===========================================================================
Note that some standard Python modules are provided as separate ports
as they require additional dependencies. They are available as:
py36-gdbm databases/py-gdbm@py36
py36-sqlite3 databases/py-sqlite3@py36
py36-tkinter x11-toolkits/py-tkinter@py36
===========================================================================
Message from bind914-9.14.3:
BIND requires configuration of rndc, including a "secret"
key. The easiest, and most secure way to configure rndc is
to run 'rndc-confgen -a' to generate the proper conf file,
with a new random key, and appropriate file permissions.
The /usr/local/etc/rc.d/named script will do that for you.
If using syslog to log the BIND9 activity, and using a
chroot'ed installation, you will need to tell syslog to install
a log socket in the BIND9 chroot by running:
# sysrc altlog_proglist+=named
And then restarting syslogd with: service syslogd restart
Test / Analyzer
MX Toolbox – SuperTool
DNS Checker
Verisign Labs – DNSSEC Analyzer
$ ls /usr/local/etc/namedb namedb -> /var/named/etc/namedb $ ls -la /var/named dev etc usr var $ ls -la /var/named/etc/namedb bind.keys dynamic master named.conf named.root rndc.key slave working $ cat /etc/fstab # Device Mountpoint FStype Options Dump Pass# /dev/ada0p2 / ufs rw 1 1 /dev/ada0p3 none swap sw 0 0 /dev/ada0p4 /var ufs rw 2 2 /dev/ada0p5 /tmp ufs rw 2 2 /dev/ada0p6 /usr ufs rw 2 2 fdesc /dev/fd fdescfs rw 0 0 devfs /var/named/dev devfs rw,ruleset=4 0 0
$ /usr/local/sbin/named -fg -t /var/named -u bind -c /usr/local/etc/namedb/named.conf
Qt: evileg.com Qt/C++ – Tutorial
Evgenij Legotskoj
Qt/C++ – Lesson 004. QSqlTableModel – How to present the table from database?
Qt/C++ – Lesson 008. QDataWidgetMapper – Working with the database via a widget
Qt/C++ – Lesson 019. How to paint triangle in Qt5. Positioning shapes in QGraphicsScene
Qt/C++ – Lesson 021. The drawing mouse in Qt
Qt/C++ – Lesson 027. Polymorphism in Qt by the example of geometric shapes in QGraphicsScene
Qt/C++ – Lesson 036. QWebView – How to make simple browser on the Qt
Qt/C++ – Lesson 045. SvgReader on the Qt. Loading data from SVG file into QGraphicsScene
Qt/C++ – Lesson 050. Logging Qt application events to a text file
Qt/C++ – Lesson 054. Reading data from a CSV file, and their representation via QStandardItemModel
Qt/C++ – Lesson 056. Connecting the Boost library in Qt for MinGW and MSVC compilers
Qt/C++ – Tutorial 063. Adding windows inside the main application window using QMdiArea
Qt/C++ – Tutorial 067. Using QMultiMap for a dictionary of synonyms
Qt/C++ – Tutorial 068. Hello World using the CMAKE build system in CLion
Qt/C++ – Tutorial 069. XOR Encryption
Qt/C++ – Tutorial 070. Crop image using QGraphicsScene
Qt/C++ – Tutorial 072. An example of a vector editor on Qt
Qt/C++ – Tutorial 073. Signals and slots. Connecting Slots to Overloaded Signals in the Qt5 Syntax
Qt/C++ – Tutorial 075. Improving the syntax of signals and slots in Qt 5.7 and above for overloaded signals and slots
Qt/C++ – Tutorial 076. Visualizing Mathematical Formulas on Qt
Qt/C++ – Tutorial 078. Do not mix the old syntax of signals and slots on SIGNAL SLOT macros with new syntax on pointers
Qt/C++ – Tutorial 079. foreach vs range-based for in C++11?
Qt/C++ – Tutorial 081. How to make a base class for widgets using ui form files
Qt/C++ – Tutorial 082. Custom widgets in the Qt Designer
Qt/C++ – Tutorial 083. Creating a dynamic library and connecting it to another project
Qt/C++ – Tutorial 084. How to run JavaScript code in a C ++ application using the example of working with two variables
Qt/C++ – Tutorial 086. Using QSequentialAnimationGroup and QPropertyAnimation to move a button
Qt/C++ – Tutorial 087. Get the maximum number of multiple input fields QLineEdit
Qt/C++ – Tutorial 088. Text search with highlighting in QTextEdit
WinAPI
Qt WinAPI – Lesson 009. SetWindowsHookEx – Logging mouse events via WinAPI
Islam: Halal (erlaubt) vs. Haram (verboten)
LaTeX: Custom Titles / Sections
KOMA-Script
Nice customised titlepage for every section (scrartcl)
\AtBeginDocument \def\section \def\@sec \renewcommand\sectionlinesformat \newcommand\sectionpreamble
Incompatibilies
Incompatibilities between KOMA-Script and titlesec
Standard-Classes
The titlesec and titletoc Packages (PDF)
Spacing before and after section titles
\usepackage{titlesec}
\titlespacing{\section}{0em}{0em}{0em}
\titleformat{\section}[frame]
{}
{}
{}
{}
LaTeX: YouTube Videos
LaTeXTutorial (Playlist)
ShareLaTeX (Playlist)
Chandra Has (Playlist)
LaTex Color / xcolor
nRF5 nRF52 Arduino
github.com/sandeepmistry/arduino-nRF5, Arduino Core for Nordic Semiconductor nRF5 based boards
Error while flashing SoftDevice – J-Link EDU
Windows 10 Bluetooth SPP – Two Virtual COM Ports
1
Bluetooth Serial Port settings for Windows10 PC
It is true that with Windows own Bluetooth software two virtual COM ports are created after pairing:
- when connecting your terminal program to the first you are actually instructing Windows to attempt to establish the Bluetooth connection to the remote paired device, and if the connection is established the RFCOMM channel will be opened for the exchange of data
- when connecting your terminal program to the second you are actually instructing Windows to load the SPP SDP record and to remain waiting for incoming connections from the remote paired device.
2
difference between incomming BT com-port and outgoing?
- An incoming port is used when a remote device established a connection to your device, and is exposed as the SerialPort service to the remote device.
- An outgoing port is used to make a connection to the serial port service on a remote device (e.g. GPS Receiver).
3
*TWO* virtual serial ports created on Windows (BT121 class SPP)
|
How to find Bluetooth settings in Windows 10
Virtual Bluetooth adapter settings on windows 10
