R71 IT Blog

Had configured my Zimbra MTA to use TLS. When using a new email client on my Windowsphone 8 operating system (yeah yeah, it’s my mobile for my job, I didn’t chose it myself) I was not able to send email via TLS and accepting self-signed-certificates. So… I had to disable TLS authentication only to be…

Yes it is a bit of a security risk. I disbled the authetication of the Synology folders (samba shares) like this:

A short overview about how to install an ESXi5 server via PXE boot using the following steps.

Error on starting mysqld # tail -f /var/log/mysqld.log 120807 14:48:55  InnoDB: Started; log sequence number 0 161811 120807 14:48:55 [ERROR] Column count of mysql.db is wrong. Expected 22, found 20. Created with MySQL 50***, now running 50***. Please use mysql_upgrade to fix this error. 120807 14:48:55 [ERROR] mysql.user has no `Event_priv` column at position 29…

How to install NTOP in Centreon, I started it but couldn’t finish it because of the incompatibility of NTOP module with the newer Centreon versions. Read more:

By default there is no tool to measure disk IO. Bootstrap your Synology to make this possible and download the package dstat. This is what I did on my DS411J

On synology Check if this command works on your Synology: smartctl -a /dev/hda -d ata | egrep "Model|Temp"

Problem It happended to me a few times that all of the Centreon graphs would not update anymore. And in /usr/local/centreon/log/centstorage.log I get a lot of these error messages: 2012-07-07 11:52:30 - ERROR while updating /var/lib/centreon/metrics/91.rrd at 1341654743 -> 0.00 : /var/lib/centreon/metrics/91.rrd: illegal attempt to update using time 1341654743 when last update time is 1341675817…

What did I do: # cat /proc/sys/kernel/msgmnb 65536 # cat /proc/sys/kernel/msgmax 65536 # cat /proc/sys/kernel/msgmni 1985 # echo 131072 > /proc/sys/kernel/msgmnb and # vi /etc/sysctl.conf and adjust the appropriate value(s).

A complete guide step by step on howto install Centreon on Centos 6.2. This is worth some money guys.

Download the Zenoss WMI library, compile and install. wget http://dev.zenoss.org/svn/trunk/inst/externallibs/wmi-1.3.16.tar.bz2 tar xvjf wmi-1.3.16.tar.bz2 cd wmi-1.3.16  

Install Weathermap cd /tmp wget http://www.network-weathermap.com/files/php-weathermap-0.97a.zip unzip php-weathermap-0.97a.zip mv weathermap /usr/local cd /usr/local/weathermap/ chown -R apache:apache * chmod u+w ./configs mv editor-config.php-dist editor-config.php cd /etc/httpd/conf.d/ vi weathermap.conf # php-weathermap-0.9 # PHP-WEATHERMAP : A php writen network weathermap graphing tool # Alias /weathermap “/usr/local/weathermap” <Directory “/usr/local/weathermap”>     #Order Deny,Allow Deny from all     # Allow from…