R71 IT Blog

Zimbra: MTA rejects mail

Zimbra: MTA rejects mail 150 150 Roderick Derks

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…

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Synology: disable folder authentication

Synology: disable folder authentication 150 150 Roderick Derks

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

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ESXi 5.1 PXE boot setup and ks.cfg

ESXi 5.1 PXE boot setup and ks.cfg 150 150 Roderick Derks

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

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Column count of mysql.db is wrong

Column count of mysql.db is wrong 150 150 Roderick Derks

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…

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Centreon: NTOP

Centreon: NTOP 150 150 Roderick Derks

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:

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Synology: howto measure disk io

Synology: howto measure disk io 150 150 Roderick Derks

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

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Synology: snmp and disk temperatures

Synology: snmp and disk temperatures 150 150 Roderick Derks

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

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Centreon: error while updating RRD graphs

Centreon: error while updating RRD graphs 150 150 Roderick Derks

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…

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NDO2DB and kernel parameters

NDO2DB and kernel parameters 150 150 Roderick Derks

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).

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Centreon and Nagios on Centos 6.2

Centreon and Nagios on Centos 6.2 150 150 Roderick Derks

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

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Nagios: setup monitoring via WMI

Nagios: setup monitoring via WMI 150 150 Roderick Derks

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  

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Weathermap standalone install and config

Weathermap standalone install and config 150 150 Roderick Derks

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…

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