1. GTalkSMS mobile alerting through xmpp protocol

    Recently I bumped into GTalkSMS when I was surfing the net for manuals on irssi & bitlbee using to chat so I could move away from pidgin.

    This GTalkSMS tool is quite cool. When am at work or at home my mobile isn't always in my sight. Therefore it could happen someone has to call me a few times before I answer the call.

    (biggest frustration of the girlfriend meaning you have to answer your call within a time period of 3 seconds because you're working in IT)

    Using this nifty tool you can control your mobile through your favorite chat …


  2. Lighttpd change tcp port in CentOS

    It seems like a very simple job, and in fact it is. But I had an issue when I tried to change this in my Cent OS 6.3 setup.

    After some digging on the internet I found out selinux was the blocking factor.

    The configuration of the new port has to be done in the lighttpd conf file.

    /etc/lighttpd/lighttpd.conf

    server.port = 2080
    

    When I changed the config file and restarted the /etc/init.d/lighttpd service I got following error:

    (network.c.379) can't bind to port:  2080 Permission denied
    

    I checked that I added the …


  3. Dropbox

    Reading this article will go through the process I went through configuring multiple dropbox accounts on my centos machine (one personal and one for work) and encrypting them both using encfs.

    That way I'm sure dropbox can't read the data stored into it. Because no I don't trust anybody on the cloud!

    In the first part I will configure 2 dropbox services using a CentOS 6 Desktop, in the second part I will encrypt those 2 dropbox services using encfs.

    The first account you can just install and configure the normal way provided by dropbox itself. Here I configured my …


  4. Puppet sslv3 alert certificate revoked

    I started the day with ssl issues using puppet. Last week I cleaned 2 hosts in our tree using the puppet command

    # puppet node clean [hostname]
    

    on the puppetmaster. I did this to clean out the stored configs for those nodes.

    But I didn't realized this also cleaned out the ssl certificates for those clients. So I started the new week with this uncomfortable issue:

    [root@agent ~]# puppet agent --test err: Could not retrieve catalog from remote server: SSL_connect returned=1 errno=0 state=SSLv3 read server session ticket A: sslv3 alert certificate revoked warning: Not using cache on failed …

  5. Writing customized icinga checks

    Recently I started to try writing a customized script for the icinga monitoring tool. I will try to describe the steps I went trough to achieve this in this post. I assume you already have a working icinga setup. If not you can find documentation about this on http://docs.icinga.org/.

    First of all you need to script. I created a script which will check if a service is running using the command

    # /etc/init.d/service status
    

    to see how to implement this in icinga. The script can be found on my github repo.

    Once you have tested …


  6. SMS server using CentOS, kannel and playsms

    On this page I will describe the way I went trough to configure an sms gateway using a laptop, huawei modem, falcom A2D-1 or the option Globetrotter hardware using the open source software kannel & playsms.

    The main goal of this project was related to the scouting movement in Belgium I'm active. We wanted to interrogate all of our members who were on a start weekend of the next scouting year. To do this we had the idea to use the sms communication channel. This because almost every youngster has the possibility to send sms messages without a big effort.

    To …


  7. SSH acces on Lacie Network Space 2

    Recently we installed a Lacie Network Space 2 at home. Easy to share documents on the LAN network, having a central place for common media etc. After playing around with it I wanted to see if it's possible to gain access to the underlying operating system of it. On that way I could for example use this access to wake up a pc with wake on LAN.

    And guess what, it can be done and thanks to a script of a guy Andreus it's even very easy! I found a forum post about his work and tested it successfully with …


  8. Create and distribute .rpm package

    You wrote a piece of software and want to distribute it on an easy way through a yum repository? That can be done, by making in the first place an rpm package of your code.

    In the first place you need to set up a directory structure. This can be done using the tool rpmdevtools on a rhel based machine:

    # yum install rpmdevtools
    

    Once you installed the software you need to setup the directory tree:

    $ rpmdev-setuptree
    

    This will install the necessary rmpbuild directory tree.

    You will see there is create a SOURCES directory, you need to get your software source …


  9. Puppet module mumble-server

    Mumble is an open source, low-latency, high quality voice chat software primarily intended for use while gaming.

    Puppet is a tool designed to manage the configuration of Unix-like and Microsoft Windows systems decoratively.

    The puppet-mumble module installs a mumble server (version 1.2.3) automatically on a CentOS 6.x machine using the puppet software based on mumble-documentation.

    The module needs a repository which contains the mumble-server package. I distribute this package on my own visibilityspots repository.

    Using puppet this will create the necessary mumble user and group and will configure the mumble-server using your desired settings, like username, password …


  10. Cisco HWIC 3G configuration to 2G

    In some cisco routing devices you have the possibility to extend the features with a HWIC 3G card so mobile connectivity is added to your network infrastructure. This can be interesting for a mobile fail-over connection.

    But as we all now, the mobile reception isn't always that good. To see the signal strength on your cisco device you can use:

    show cellular 0/0/0 connection
    

    depending on which slot you plugged the HWIC card into. If the measured value is beneath the -100 dBm then you have sufficient signal to setup a 3G ( CDMA - WCDMA) connection on.

    If that's …


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