Snorby in CentOS 6.4

25/02/2014: Hi, I’ve created a new post for CentOS 6.5 but it may work also for CentOS 6.4, please visit this new post before. I’ll keep this article as an archived version if you need to compile wkhtmltopdf for any reason.


If I want to have fun with Suricata IDS I think it will be useful to have a monitoring tool to track possible alerts. I’ve chosen Snorby as it seems to have a nice and intuitive GUI. Snorby uses ruby on rails and a mysql database. After many attempts I’ve finally got it running so I want to share with you the steps I’ve followed.

According to its web page, Snorby requires:

  • Ruby > 1.9.2
  • ImageMagick > 6.6.4
  • Rails > 3.0.0
  • Wkhtmltopdf

Unfortunately, packages in CentOS 6.4 repositories have older versions, maybe you can find newer versions in other repositories but time I’ll stick with the official repositories. Compilation fun! Warning: if you use the following commands check if newer versions of downloaded packages exist and change directories and names accordingly.

  1. We’ll start installing some packages using yum
    yum groupinstall "Development Tools"
    yum install openssl-devel readline-devel libxml2-devel libxslt-devel mysql mysql-devel mysql-libs mysql-server urw-fonts libX11-devel libXext-devel qconf fontconfig-devel libXrender-devel unzip wget
  2. Let’s compile ImageMagick.
    cd /opt
  3. tar xvfz ImageMagick-6.8.5-9.tar.gz
    cd ImageMagick-6.8.5-9
    make install
    ldconfig /usr/local/lib
  4. Time for Wkhtmltopdf. I’ve downloaded the source files because I had problems with the static versions of Wkhtmltopdf. I’ve used the readme file (README_WKHTMLTOPDF) which comes with wkhtmltopdf as a guide, but notice that the gitorious repository is not found.Warning: this step is going to take a loooong time so if you don’t need pdf reporting skip it.Warning: if you see squares in your pdf report instead of text install with yum the urw-fonts package. This information is provided thanks to this stackoverflow question.
    cd /opt
    git clone git:// wkhtmltopdf-qt
    cd wkhtmltopdf-qt
  5. // Edit the mkspecs/linux-g++-64/qmake.conf file and change the following lines:
    QMAKE_LIBDIR_X11 = /usr/lib64
    QMAKE_LIBDIR_OPENGL = /usr/lib64
  6. ./configure -nomake tools,examples,demos,docs,translations -opensource -prefix ../wkqt
    make -j3
    make install
    cd /opt
    tar jxvf wkhtmltopdf-0.11.0_rc1.tar.bz2
    cd wkhtmltopdf-0.11.0_rc1
    ln -s /opt/wkhtmltopdf-0.11.0_rc1/bin/wkhtmltopdf /usr/local/bin/wkhtmltopdf
    ln -s /opt/wkhtmltopdf-0.11.0_rc1/bin/ /usr/lib64/
  7. MySQL!. Start the service and if it’s the first time you install it use the mysql_secure_installation to set root’s password and remove unnecessary tables.
    service mysqld start
    chkconfig mysqld on
  8. And now we need Ruby and RubyGems. I’m installing ruby 1.9.3 from ruby’s webpage.
    cd /opt
    tar xvfz ruby-1.9.3-p448.tar.gz
    cd ruby-1.9.3-p448
    make install
    cd /opt
    tar xvfz rubygems-2.0.4.tgz
    cd rubygems-2.0.4
    ruby setup.rb
  9. We now have gem installed and we’re going to install bundler gem which is needed by Snorby setup.
    cd /opt
    gem install bundler
  10. OK. I want to use Snorby so I need to download it!. I’ve had problems with the latest git version of snorby so I had to use the zip with the stable version (which is linked from Snorby’s webpage).
    wget -O --no-check-certificate
    cd snorby-master
  11. Now, pay attention! I’ve found many problems trying to use bundle with ruby 9.3 and I spent several hours finding out what to do. This is what I’ve done, I can guarantee that it’ll work with a newer ruby or snorby version but at least if you find the same problem you won’t suffer. If you find any error please contact me maybe I can help you and update the post so it’s useful for other users.
    //Edit the Gemfile file and change this line: 
    //gem 'rake', '0.9.2'   to:  gem 'rake', '> 0.9.2'
    //unless you want this error to show when using bundler: "error: /usr/local/lib/ruby/gems/1.9.1/gems/bundler-1.3.1/lib/bundler/fetcher.rb:112:in `specs': undefined method `each' //for nil:NilClass (NoMethodError)"
    //Edit the Gemfile file and add this line: 
    //gem 'orm_adapter' after the line: gem netaddr, 
    //unless you want this error when using bundler: 'orm_adapter' file not found
    //Edit Gemfile.lock and change rake (0.9.2) to rake( 
    //so rake setup does not complain about a different rake version
    //Create a snorby_config.yml file. Edit the production section and set your domain
    cp config/snorby_config.yml.example config/snorby_config.yml
    // Create a MySQL database and a user for snorby
    mysql> create database snorby;
    Query OK, 1 row affected (0.00 sec)
    mysql> grant all privileges on snorby.* to snorby@localhost identified by 'snorby';
    // Create a database.yml config file. 
    // Edit the file and set the root password and MySQL server location
    cp config/database.yml.example config/database.yml
  12. OK! Now let’s install Snorby. And don’t forget to read the file provided by Snorby’s developers
    // We are in the snorby directory 
    bundle install
    rake snorby:setup
    // This is the command's output
    ERROR 1007 (HY000) at line 1: Can't create database 'snorby'; database exists
    [datamapper] Finished auto_upgrade! for :default repository 'snorby'
    [~] Adding `index_timestamp_cid_sid` index to the event table
    [~] Adding `id` to the event table
    [~] Building `aggregated_events` database view
    [~] Building `events_with_join` database view
    * Removing old jobs
    * Starting the Snorby worker process.
    * Adding jobs to the queue
  13. Snorby is installed woohoo! Before launching it let’s create an iptables rule (TCP 3000 is the default port)
    iptables -I INPUT -p tcp --dport 3000 -m state --state=NEW,ESTABLISHED,RELATED -j ACCEPT
  14. And now finally let’s start Snorby in my CentOS 6.4 server:
    rails server -e production
    Booting WEBrick Rails 3.1.12 application starting in production on
    Call with -d to detach 
    Ctrl-C to shutdown server
  15. If all is fine, open a web browser http://x.x.x.x:3000.  Here, two screenshots so you can check that I haven’t lied to you.

Snorby default credentials are: and password snorby.

I’ve had several issues with QT compilation and these links helped me:



19 thoughts on “Snorby in CentOS 6.4

  1. Anonymous says:

    Quick note: for wkhtmltopdf on a production server, you’ll need xvfb.
    I’ve used qt-webkit for page rendering, and I needed to use xvfb when moving the whole thing on a standalone server.

    If you’ve used a better trick, please share 🙂


  2. mephux says:

    Nice post! I am the developer of Snorby. I just wanted to add that there are a few static builds ( of wkhtmltopdf that you can use as well. This will cut out that whole step.

    I would also like to add that if you are not running rails with apache or nginx, please use the thin webserver. The default is webbrick I believe which is single threaded and will block pretty much all the time. It also doesn’t support a lot of the modern things http servers do. Most notably streaming.


      • Roman says:

        @n40lab thank you very much for this helpful guide! @mephux also thank you for your suggestions! I am not sure what the problem is but adding gem ‘thin’ to the Gemfile and bundle installing again did not change the default server, rails was still using webrick. Found the following temporary fix though, when starting web server simply add “thin” to command line “rails server thin -e production”.


    • n40lab says:

      nice to meet you mephux! First of all thanks a lot for Snorby… it’s awesome!, a nice GUI, easy to use, great features, and so useful for monitoring… thanks for sharing your work.

      Also thanks for your comments, this weekend I’ll try all your suggestions and I’ll update my post with the results.




  3. GeorgeZ says:

    Thank you for that document. I am actually not having a problem running with ruby 1.9.2 (but had a problem and was unable to make it working with ruby 2.0.0, so had to delete ruby and install 1.9.2), rake 10.1.0, rails 4.0.0.


  4. Parvez says:

    Hi there,

    Thank you for the detailed tutorial.

    I’m facing error when trying to install ruby 1.9.3-p484 on CentOS 6.5-x64. The snapshot of the error is as follow.

    make[1]: *** [ossl_pkey_ec.o] Error 1
    make[1]: Leaving directory `/opt/ruby-1.9.2-p320/ext/openssl’
    make: *** [] Error 1

    Please guide me through.

    Thank you, once more.


    • n40lab says:

      Hi Parvez,
      I’ll try to install Snorby on CentOS 6.5 this weekend on a clean machine following my guide so I can reproduce your error, and let you know the result.

      Thanks for reading!


  5. Parvez says:


    I’m terribly sorry for pasting wrong error output. In fact, I tried both ruby 1.9.2 and 1.9.3 and faced the same issue.

    Sorry for any inconvenience.

    Thank you.


    • n40lab says:

      By the way, I’ve just finished installing Snorby in CentOS 6.5 if you can wait tomorrow I’ll create a new post with some enhancements that makes quicker the installation process.



      • W. White says:

        That’s great. I am using your insightful post as a project to get better at CentOS and also have a great dashboard for my pfSense Snort logs on my home lab. Currently I am kind of confused/stuck on step 4 when it comes to configuring Wkhtmltopdf on CentOS 6.5. Great work, looking forward to read your new post.


      • n40lab says:

        I’ve just finished the post. I hope it’ll help you, sorry for the delay.

        Thanks for reading my blog and for your comment.


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