"Scheunenfund" Kapsch troubadour tr7020 - Radio von 1978

Ein wahrlicher Scheunenfund ergab sich bei Freunden von mir als sie auf ihren Anliegen Umbauten und eine alte Hütte abrissen. Als Fan von in den Jahren gekommener Radios stand ich sofort bereit um mich diesem Patienten anzunehmen und ihm wieder ein wenig neues Leben einzuhauchen.

Die Funktion war eigentlich wie am ersten Tag, jedoch war er sehr verstaubt und die Zierleiste an der Front hing ein wenig schief.

Nach 1h intensivem polieren sowie neu verkleben der Leiste erstrahlt er wieder wie neu :-)

Mikrotik - automatischer WPA Key Wechsel

Jeder der schon mal automatisch seinen Wlan Schlüssel wechseln lassen wollte, kann dies mit dem angefügten Script lösen.

Ich starte es jeden Tag um Mitternacht und stelle somit für mein Gäste Wlan den Schlüssel auf den jeweiligen Tag ein. Dies erlaubt mir eine geringfügig bessere Sicherheit als ein statischer Schlüssel, welcher täglich gleich bleibt...

:global wlankey [:pick [/system clock get]]

/interface wireless security-profiles set wpa-pre-shared-key=$wlankey wpa2-pre-shared-key=$wlankey  numbers=wlan-profile

Der output wäre hier für Heute sep/23/2013

Ab Mitternacht ist das Passwort sep/24/2013

Nexus 7k delivery

Having big balls..

ssh-key exchange with remote server for password less authentification

long time ago with no update, ok - i guess its a good day to do some.. :p

most it-admins are confronted with doing some ssh-sessions to their remote servers.

time costs money, so if u like to get more comfortable with connecting to them, here is a little tutorial from me that will treat ssh authentification with public keys.

on the ssh-client: ( im currently logged in with my root acc )

#cd .ssh/

#ssh-keygen      # will generate your public key

#cat *.pub | ssh root@IP-of-RemoteServer 'umask 077; cat >>.ssh/authorized_keys2' 

after all your public key will be copied to the remote host.

on the remote-host:

edit your /etc/ssh/sshd_config

be sure that the following options are enabled.

PubkeyAuthentication yes

AuthorizedKeysFile  ~/.ssh/authorized_keys2   # the key path should be the same like on the client

to test your setup, just do a ssh username@RemoteServer

from now you shouldnt be asked for a user / pass.

IPKG for Synology DS213+

CAUTION: before upgrading your DSM disable IPKG ( if its already installed )! 

=> /etc/rc.local

original source: http://www.synology-wiki.de/index.php/IPKG

Install IPKG:

ssh onto NAS

ssh root@NAS

afterwards change to root dir

cd /volume1/

Remote Sniffertrace with tcpdump and netcat

sometimes there is the need to capture network traffic on a remote host, but the host hasn't got enough disk space or resources to handle the traffic. for this issue we can work with a remote capture host using netcat and tcpdump!

Situation: 1x Client ( local ) - 1x Server ( remote )

netcat has to be installed on the local client and the syntax should be as follow:

WIFI / DHCP bug after upgrading to OSX 10.7.3

as reported many times on the internet, it seems that there is a bug included in the newest OSX version 10.7.3 upgrade, which affect not all, but some MACs.

same happened on my Mac Book pro ( mid 2009 ) :-(

after the upgrade process and a post reboot, i couldn't get online with my WIFI connection anymore.
also plug in a network cable couldn't fix this issue. it seems like there are problems in getting an ip address.

the only way to FIX this problem is to restore the ( old ) /etc/authorization file.

i got an backup of this file in time machine and also in /etc/authorization~backup

after restoring the file ( from 10.7.2 or earlier ) and a reboot, everything works like a charm.

thanks to apple ( .. )

Opsview with Heartbeat(linux-ha) and drbd on Cent OS 5.5

after spending many hours in reading and reading on howto setup a fully functional working opsview instance on CentOS 5.5, i finally document everything ..


opsview is a product of http://www.opsview.com

INSTALL CentOS

We have two servers with two NICs. One NIC is for the heartbeat and the other to connect to the nework. We synchronize the Database via mysql-Replikation. First you need to Setup centOS on both servers. We parted our300GB harddisk like this. You can keep it like this.

network hints

Content password secured, Show encrypted text ..

BLOG launched!

online :D