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Tag: Bugs

Raspberry Pi: Raspian disadvantages of embedded OS

The last 12 month have been a “golden” time of the upcomming embedded linux devices, but the custom OS’s offers some problems, you should know for projects: embedded PC’s like the ARM based pi2 / pi3 uses a own compiled OS not every known debian package is available not all compile scripts to rebuild are available on git slow performance can let you run into unuseable problems (heat, load, I/O), correct written scripts run into freezes without any error made by you! you should take time for a closer look at buying them calc the costs of non-x86 systems, later […]

Security: Harden DSL Routers and Networks against attacks

Last days there was a high count of news about the Bot Attacks against T-Com Telekom Router devices. To understand the behavior about this up comming security problems you should know following points : Every network supported device can be a goal for a attack ( Routers, Modems, PC, Fridges,IP-TV, IP Switches, IP-Cams…) You have to update the OS for each device monthly, if not supported by the manufacter, then dont buy! Try to get Opensource Hardware with Opensource Software for full access (ssh / console) to have full control Reduce the count of devices who are connected direct to […]

How to compile the Centos SME Server 7.4 Linux Kernel 2.6.34

Download the latest stable kernel from the http://www.kernel.org/ unpack the downloaded source file. Steps: # wget http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.34.tar.bz2 # tar xjf tar xjf linux-2.6.34.tar.bz2 # ln -s linux-2.6.34 linux # cd linux # cp /boot/config-`uname -r` ./.config # make menuconfig (here you can select .config as preselected .config from old kernel) # make rpm (Compile the Kernel and make a rpm-paket) During the compilation of linux-2.6.34 kernel the following error appears drivers/message/fusion/mptsas.c: In function `mptsas_port_delete' drivers/message/fusion/mptsas.c: 105: sorry, unimplemented: inlining failed in call to 'mptsas_set_rphy': function body not available drivers/message/fusion/mptsas.c: 467: sorry, unimplemented: called from here Because: The ‘mptsas_set_rphy’ function is […]

Fritzbox: DHCP-IP Problems

Problem:Probleme mit IP-Adressvergabe ueber DHCP, wenn auf dem gleichen Rechner unterschiedliche Betriebssysteme laufen  Beschreibung: Wird ein Rechner mal unter Linux und mal unter Windows betrieben, so kann es passieren, dass der Rechner unter einem der beiden Systemen keine IP-Adresse mehr zugewiesen bekommt. Waehlt man sich per Telnet auf der Fritzbox ein, so sieht man dort die Fehlermeldung “DHCPD no lease found”. Um dieses Problem zu vermeiden, muss der DHCP- Client unter Linux wie folgt korrekt konfiguriert werden: Loesung : In der dhclient.conf des Client-Rechners muss “send dhcp-client-identifier 01:<mac-addresse>;” eingetragen werden. Anschliessend auf der Fritzbox den multid mit “killall multid” beenden, das lease-file […]