If you use a small PC as Home Server NAS with a attached USB Drive you perhaps remark that the drive ALWAYS spinning if the Samba Daemon is active. I researched this behavior and found out that the Samba Deamon (smbd) locks the drive access via VFS to the Kernel for the Powermanagement Tools like […]
Category: Micro Server
Apache2 evasive Problems with WordPress
If you use Apache2 / Apache24 and anti-hammering tools like the Modul evasive and security2 as addon fail2ban than you can fail blogging. Problems: Apache2 Module “evasive” must be fine tuned for WordPress go /etc/apache2/ if you use default enabled auto-safe drafts of posts can let you look like a Attacker so disable auto save […]
Smartmontools unlisted Devices
If you use a Toshiba Canvio 3tb Drive at a raspi then smartmontools will not see the usb drive. Try: sudo smartctl -t long -d sat -s on /dev/sdb -t test long or short -d drive protocol sata = sat -s enforce smart which is off by the usb drive firmware wait XXX Minutes then: […]
Postfix: Automatic UFW Firewall Updates
If you use a Mail Server with Postfix you got daily Spam Attacks by Scripts: How to fix? Install ufw Firewall Run a Scanner Script as cronjob On Debian/Ubuntu: Install ufw: sudo apt-get update && sudo apt-get install ufw && sudo ufw enable && sudo ufw logging off Scan Script: sudo nano /home/user/firewall-update.sh: #!/bin/bash # […]
Linux Console: SSH Echo Last User LOGIN Info
If you use SSH Logins to your Systems, you perhaps want to know, who logged in last days and from which IP Address. Screenshot SSH Login Echo LAST Info: Howto: Open the .profile File at your Home with a Editor and enter: clear last -n 4 This will echo after login the last 4 Logins […]
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 […]
Security: Webserver HTTPS with Self Signed Certificate Do it yourself in 5 Minutes!!
Today the Point of Security and encrypted Webserver Communication is rolling over every User who hosts own Websites on the Internet. Last decades HTTPS was only used by Online Login Pages like Shops and Banks to verify the Communication between a User PC and the Website. But after January 2015 the most Search Engines like […]
Hardware Tip: “Null Euro” entkoppelte Festplatte (“Zero Dollar” Hard Drive acoustic decoupling)
Problem: Festplatten brummen in PC Gehaeuse, Schwingungen werden uebertragen. Harddrive rotations transmitted by case parts and acousitc boosted up Professionelle Produkte zum entkoppeln kosten bis 30 Euro. Professional Parts must be paid up to 40 Dollars/Drive Lösung: “Null Euro” Lösung – “Zero Dollar” Solution Festplatten im 5.25 Zoll Laufwerk auf Einmachgummis haengen Harddrives mounted on […]