Im NETWAYS Shop bieten wir SMS Gateways an. Einer unserer liebsten Hersteller ist hier Braintower aus St. Ingbert im schönen Saarland. Das Braintower SMS Gateway ist einer unserer Bestseller. Der automatisierte Versand von SMS Nachrichten über eine HTTP API zeichnet jedes Braintower SMS Gateway aus.
Dank übersichtlich gestaltetem Web-Interface und Adressbuchfunktion wird es einfach wie nie zuvor, SMS an einzelne Telefonnummern oder Kontakte zu senden. Zur Sicherheit Ihrer Datenübertragungen wird dabei standardmäßig HTTPS genutzt.
Das Braintower SMS Gateway ist im NETWAYS Shop in zwei Varianten erhältlich.
Erlaubt die Anbindung an z.B. Monitoring Server über API (kompatibel zu MultiTech iSMS )
Isabel ist seit Februar zurück bei NETWAYS. Bis 2009 war sie unsere Office Managerin und verstärkt nun ab sofort das Sales Team. Hier ist sie für alle Belange des Online Stores verantwortlich. Der Ein- und Verkauf der Monitoring Hardware sowie die Weiterentwicklung des Shops und seines Portfolios wird sie mit ihrem bekannten Tatendrang gehörig vorantreiben.
Privat verbringt die halbgriechische Ruhrpott-Fränkin sehr gerne so viel Zeit wie möglich mit ihren bald 4-jährigen Patensöhnen oder schreit sich für den Club - als stolze Dauerkartenbesitzerin! - die Seele aus dem Leib.
BAREOS Introduction
Puppet for BAREOS
Scripting BAREOS
The conference will be held from September 25 to 26, 2017 at the Steigenberger Hotel in Cologne.
What awaits you: Core theme of the Open Source Backup Conference is the development and application of open source sofware solutions for data backup. The conference agenda covers the latest developments, conveys strategic knowledge and presents empirical reports as well as best practices, case studies and technical background. Apart from that, three hands-on workshops on September 25 are offered!
Julia hat 2017 ihre Ausbildung zum Office Manager bei NETWAYS absolviert und währenddessen das Events&Marketing Team kennen und lieben gelernt. Besondere Freude bereiten ihr bei NETWAYS die tolle Teamarbeit und vielseitige Herausforderungen. Privat nutzt Julia ihre freie Zeit, um so oft wie möglich über's Handballfeld zu flitzen und sich auszutoben. In ihrer neuen Rolle als Marketing Managerin freut sie sich auf spannende Aufgaben und hofft, dass ihr die Ideen für kreative Texte nicht so schnell ausgehen.
Vor einiger Zeit trat der Wunsch auf mit dem aktuellen Icinga-2-Modul für Puppet beliebe Objekte aus Hiera heraus zu erzeugen. Zum Beispiel aus folgender Hiera-Datei sollen ein Host-Objekt und zwei Service-Objekte gebaut werden.
Dieses Verfahren ist mit dem selben Code auf Objekte mit allen möglichen Objekt-Typen erweiterbar. Passt man den Funktionsaufruf von lookup entsprechend an, kann auch über die Hiera-Struktur gemerged werden.
Der diplomierte Mathematiker arbeitet bei NETWAYS im Bereich Consulting und bereichert seine Kunden mit seinem Wissen zu Icinga, Nagios und anderen Open Source Administrationstools. Im Büro erleuchtet Lennart seine Kollegen mit fundierten geschichtlichen Vorträgen die seinesgleichen suchen.
Vim is pretty great, honestly. But since I started using vim after growing tired of nano, a lot in my .vimrc changed… To the point where colleagues who use vim on their machine rather use nano on mine before trying to wrap their head around my workflow. Every .vimrc is different and a lot of them exist out there, over twelve thousand repositories of shared vim configurations on GitHub alone and many more on private laptops and computers.
Generally creating a .vimrc works like creating a Makefile: Copy and paste from different sources with small changes until you have an approximation of the desired result and then need to decide whether you want to go the extra mile of dealing with your configurations’ and Vims’ quirks to get it working properly or you just leave it be. This is followed by years of incremental tweaking until you have a Vim environment which works perfectly but you don’t know why. At least that’s how I do it ¯\_(ツ)_/¯
So I took a dive into my own to see what kind of madness lurks down there…
set nocompatible
set t_Co=16
set shiftwidth=4
set tabstop=4
set autoindent
set smartindent
filetype plugin on
filetype indent on
So far, so good. Nothing special. Other than that indentation is set and overwritten three times, this has not lead to any problems (yet). The next lines are a bit more interesting:
call pathogen#infect()
call pathogen#helptags()
syntax on
set background=dark " dark | light "
colorscheme solarized
pathogen is a runtime manipulator which allows you to add additional plugins to Vim easier, in my case these are vim-solarized, a popular colourscheme, and vim-fugitive, a plugin that adds git commands within Vim. #infect() loads these plugins and #helptags() generates documentation. The following lines make use of solarized and add syntax highlighting.
set nu
set listchars=eol:$,tab:>-,trail:.,extends:>,precedes:<,nbsp:_
set list
let &colorcolumn="121"
set splitbelow
set splitright
set viminfo='20,<1000
This controls numbering and control characters, colorcolumn adds a ugly line over the 121’st char to keep up with coding styles. split tells vim where to add new views when splitting (I rarely use these) and viminfo sets the copy buffer to up to 1000 lines.
Now we get to the really interesting bits, key remaps!
Artist rendition of the authors .vimrc
"See :help map-commands
"n = Normal only
"v = Visual only
"i = Insert only
" = Normal+Insert+Select only
" nore = disable recusiveness
" map = Recursive map
"split window switching
nnoremap <C-J> <C-W><C-J>
nnoremap <C-K> <C-W><C-K>
nnoremap <C-L> <C-W><C-L>
nnoremap <C-H> <C-W><C-H>
"Make Up and Down Arrows move half a screen
"instead of 1 line
noremap <Up> <C-U>
noremap <Down> <C-D>
"BUFFERS Used to be F6,F7. Now used by flake
set hidden
noremap :bprevious
noremap :bnext
"Because buffers change Flake to use F3 instead of F7
"autocmd FileType python map :call Flake8()
" DOES NOT WORK DAMN
"Smart Home key
noremap <expr> <Home> (col('.') == matchend(getline('.'), '^\s*')+1 ? '0' : '^')
imap <Home> <C-o><Home>
Switching windows can be hassle without the first four remaps, but again, I rarely use split windows. Mapping the up and down arrows to jump half a screen instead just one line I added to stop myself from using them instead of j and k, I have grown quite used to it, so it gets to stay ^_^
Buffer remaps are a must! Because I do use them a lot. There have been problems with Flake, a python lint tool, which I tried to avoid by remapping flakes key… Didn’t work out, so I got rid of Flake and call pylint when required instead.
The smart home key makes the <home>-key jump to the first non-whitespace char in a line instead of the begining of the line, quite handy!
"Access commandwindow with ctrl+f or :cedit
"For dorks
map q: :q
command Wsudo w !sudo tee % > /dev/null
"Jump to next line > 120 chars
command Warnl :/\%>120v./+
"For easy copy-paste
command Cpm :set nonu paste cc= nolist
"Catch regular caps failure
command WQ :wq
These are just a few quality of life improvements, I tend to mistype :q as q: and :wq as :WQ. The :Wsudo command lets me edit read-only files and :Cpm is for easy mouse copy and paste. :Warnl jumps to the next line with more than 120 chars, this again is to check for style problems.
Alright, that’s it. My current .vimrc. There were a few commented out lines I omitted because I have no clue what I was thinking at the time anymore, but I hope there were a few little bits someone else might find useful to feed their own beast of a .vimrc with.
Image sources:
Vim logo from vim.sexy
Shoggoth by twitter.com/nottsuo
Auch wenn man Anderes vermuten möchte: Jean ist nicht unser französischer Austauschazubi, sondern waschechter Bamberger. Die Uni war ihm zu langweilig, deshalb knöpft er sich nun im Development gleich die kniffligsten Aufgaben vor.
We recently had an support inquiry from one of our Nextcloud customers at Netways Web Services. He told us that he had installed the Nextcloud Video Calls app from the Nextcloud Appstore but was not able to make any video calls. He and the person on the other end always got a black video screen when attempting to call each other.
After some research I identified the potential cause of the problem. It turned out that a TURN server was required (pardon the pun).
TURN – what is that?
The Nextcloud Video Calls app contains a WebRTC-based server called spreed. WebRTC uses the ICE (Interactive Connectivity Establishment) framework to overcome networking complexities (like NATs) where connecting the participating clients directly isn’t possible. But it will need at least a STUN server to accomplish that. STUN standing for “Session Traversal Utilities for NAT” will enable the clients to discover their public IP addresses and the NAT where they are behind. Note that this server is only used to initially establish the connection. Once the connection is set up the media will stream directly between the clients. The Nextcloud Video Calls app is preconfigured with “stun.nextcloud.com:443” as STUN server. But this doesn’t always work – just like our customer experienced it, for some clients a STUN server won’t be enough to establish the connection. That might be the case if one or multiple participants are behind a symmetric NAT where UDP hole punching does not work. And that’s where the TURN server comes in. “Traversal Using Relay NAT” (TURN) extends STUN capabilities to make media traversal possible even if the clients are behind symmetric NATs. But that means that the whole traffic will flow through the TURN server since it is acting as a relay. Therefore most TURN servers use credential or shared secret mechanisms to authenticate the clients. So after all you end up having two options: either you find a TURN server provider that you can trust and who is willing to grant you access to his service or you set up your own TURN server.
How to set up a TURN Server
We decided to set up our own TURN. Like most of the tutorials recommend we installed Coturn. Our “TURN-VM” is running Ubuntu 16.04 and has a public IP address – this is actually quite important since the TURN server needs at least one dedicated public IP address to work properly. In order to have full STUN/TURN server functionality it’s even required to have two public IP addresses.
Now let’s start – first install coturn:
apt-get install coturn
Next enable coturn as service (use the editor of your choice):
vim /etc/default/coturn
Now uncomment the last line, save and close the file:
#
# Uncomment it if you want to have the turnserver running as
# an automatic system service daemon
#
TURNSERVER_ENABLED=1
We will have a look at the config file of Coturn. It has a lot of lines so I will only go over settings that are relevant in conjunction with Nextcloud’s spreed video calls. Open the turnserver.conf with an editor
vim /etc/turnserver.conf
and have a look at the following lines
#listening-port=3478
#tls-listening-port=5349
Those are the default listening ports coturn will use. In my case I changed them to
listening-port=80
tls-listening-port=443
because I don’t have a webserver running on the VM and I already had the ports open in the firewall. This is important – make sure that the server is reachable on these ports and no firewall is blocking them.
Note that the tls-listening-port is only relevant if you plan on using TLS-encrypted connections.
You’ll find the following line a couple of lines below the tls-listening-port:
#listening-ip=172.17.19.101
If you leave it as a comment then Coturn will listen on all the IP addresses available for this host. I uncommented it and changed it to the actual public IP address of this server
listening-ip=185.XX.XXX.XXX
Further down I did the same for the relay-ip:
relay-ip=185.XX.XXX.XXX
Now look for “fingerprint” and “lt-cred-mech” and uncomment:
fingerprint
lt-cred-mech
A couple of lines below you’ll find
#use-auth-secret
and
#static-auth-secret=north
uncomment both, then open up another shell window and generate a secret for example with
Enabling “use-auth-secret” and setting a “static-auth-secret” will prevent unauthorized usage of your TURN server and is highly recommended!
Head further down and look for
#realm=mycompany.org
then uncomment and change it to the FQDN of the TURN server
realm=xxxxx.netways.de
The next line to uncomment and change is
total-quota=100
then uncomment
stale-nonce
If you want to use TLS then you should get a SSL certificate and key for example via Letsencrypt and then set the following lines of the turnserver.conf to the path where those files are located, in my case:
If you get a timeout with “Not reachable?” then probably a firewall is blocking the connection. Check again if the ports for the TURN server are open and if you can reach it externally via Telnet or something similar.
If everything works as expected you can continue and enter FQDN, port and shared secret in the video calls settings of your Nextcloud:
Also make sure that “TURN server protocols” is set to “TCP only”.
Finally test if video calls work with participants from different networks, through NAT’s and firewalls.
Well, that’s at least how I got it working and our NWS Nextcloud customer confirmed that he was able to make video calls without black screens as soon as he added in the TURN server details that I sent him.
Feel free to check out our Software as a Service platform NWS where you can test Nextcloud 30 days for free.
Gabriel freut sich nun in seiner Ausbildung zum Fachinformatiker für Systemintegration bei NETWAYS endlich sein im Informatikstudium gesammeltes Wissen artgerecht anwenden zu können. Wenn er nicht gerade an Servern, PC’s und sonstigem bastelt, vertreibt sich der gebürtige Oberfranke seine Freizeit mit Radfahren, Fotografie und Snowboarden. Vor allem reizen ihn interessante Projekte und das Arbeiten an Open Source basierten Linux-Systemen.
Im NETWAYS Shop bieten wir SMS Gateways an. Einer unserer liebsten Hersteller ist hier Braintower aus St. Ingbert im schönen Saarland. Das Braintower SMS Gateway ist einer unserer Bestseller. Der automatisierte Versand von SMS Nachrichten über eine HTTP API zeichnet jedes Braintower SMS Gateway aus.
Vor einiger Zeit trat der Wunsch auf mit dem aktuellen Icinga-2-Modul für Puppet beliebe Objekte aus Hiera heraus zu erzeugen. Zum Beispiel aus folgender Hiera-Datei sollen ein Host-Objekt und zwei Service-Objekte gebaut werden.
Vim is pretty great, honestly. But since I started using vim after growing tired of nano, a lot in my .vimrc changed… To the point where colleagues who use vim on their machine rather use nano on mine before trying to wrap their head around my workflow. Every .vimrc is different and a lot of them exist out there, over twelve thousand repositories of shared vim configurations on GitHub alone and many more on private laptops and computers.
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