| Security – Convert PFX to PEM using Windows or Linux |
For certain application, a job partner asked me to send him certain certificate with private key in PEM format. Normally I’m using PFX format, but with a little help of the openssl toolkit converting PFX to PEM is quite easy.
openssl for windows can be downloaded here: http://gnuwin32.sourceforge.net/packages/openssl.htm
After extracting the contents, inside the bin subfolder the openssl … Read more
| Linux – Running top command remotely (SSH) |
Maybe you have tried to execute the top command to monitor processes on a remote host.
If so, the following error can be returned:
$ ssh user@remotehost top -n1
TERM environment variable not set.
top does not work remotely in the default “interactive” mode. Use the “-b” parameter to run it in … Read more
| Icinga – Installation / Setup on Debian Linux (2) |
The second of my post series to show the installation and setup of the Icinga monitoring tool. This one covers the installation of the Icinga 2 Web frontend.
Please, if havent done before, visit the first post Icinga – Installation / Setup on Debian Linux (1) which covers the installation of the Icinga core engine.
These are the steps i … Read more
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| Icinga – Installation / Setup on Debian Linux (1) |
As you can see in previous posts…, Im in love with Nagios to monitor my systems… after creating some powerful, customized plugins for my Checkpoint firewalls, Exchange servers… cannot live with it… but maybe, it's "a bit" old fashioned and I have decided to try the Icinga monitoring tool. If it fits my environment, I'll have to replace my old … Read more
| Ironport – Automate commands / scripts from Linux |
In a previous post (Linux: SSH connection without password (RSA public-key) I showed the way to configure a non-interactive SSH connection from-to a Linux system.
If the target system is a Ironport ESA device, the configuration is almost the same (generation of the key pair and configuration of the private one). But to install the new public key on … Read more
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| Linux – Create custom inetd service |
The inetd (also known as superserver) is a daemon that provides (commonly on Linux and Unix systems) internet services. The configuration file inetd.conf contains the list of the offered services by the daemon. The clients connect to certain port and inetd launches the corresponding program to process the connection.
This example shows how to setup a service that executes remote … Read more
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| Linux – How to mount remote FTP |
I was looking for a way to access my Ironport appliance folders remotely so I can execute scripts applied to them.
By installing the curlftpfs package and configuring a fstab entry I have been able to access via a local mount the contents my Ironport offers via FTP
This example is for Debian, but the package … Read more
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| Mounting windows shares (CIFS-SMB) via fstab |
# cat /etc/fstab | grep SHARE
//FILESERVER/SHARE$ /mnt/SHARE cifs username=domain\user,password=mypassword 0 0
# mount /mnt/SHARE
# ls -ld /mnt/SHARE/
drwxrwxrwx 1 root root 4096 2014-07-01 08:34 /mnt/SHARE/
# cat /etc/fstab | grep SHARE
//FILESERVER/SHARE$ /mnt/SHARE cifs credentials=/root/.smbcredentials 0 0
# cat /root/.smbcredentials
username=domain\user
password=mypassword
Dont forget .smbcredentials permissions
# … Read more |
| Linux – Bash scripting useful commands and tips |
Some examples of very simple commands and features that become very powerful when used together. In future posts we'll see real examples of bash scripts used to create custom nagios checks/plugins.
# cat FILE1
this is the file1
# cat FILE2
this is the file2
# cat FILE1 FILE2
this is the file1
this is the … Read more |
| Linux: snmpwalk command mini-howto |
snmpwalk command allows us to perform SNMP queries to recover a single or multiple values (depending on the OID we use). I find it very useful in shellscripts, and then configured as Nagios custom service check or plugin.
There are lots of options (this post is a very basic howto. You can read the manpage for further information), but basically … Read more