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46%
Targeted defense against brute force attacks
30.11.2025
Home »  Archive  »  2011  »  Issue 3: Are yo...  » 
Andrii IURLOV, 123RF.com
-N sshguard The second command handles IPv6 packets. The next step is to extend the input chain so that network traffic is routed through the sshguard chain (Figure 2): sudo iptables -A INPUT -j
46%
Monitoring your cluster with a home-grown OCF agent
30.11.2025
Home »  Archive  »  2012  »  Issue 07: Xen v...  » 
© Aleksey Mnogosmyslov, 123RF.com
# start. 32 if [ -n "$OCF_RESKEY_monitor_sipuri" ]; then 33 ocf_run sipsak -s "$OCF_RESKEY_monitor_sipuri" 34 rc=$? 35 case "$rc" in 36 1|2) return $OCF
46%
OpenVPN with e-tokens in large-scale environments
30.11.2025
Home »  Archive  »  2011  »  Issue 5: Pen Te...  » 
© sTan, fotolia.com
VPN. The free SSL virtual private network (VPN) joined the mainstream with release 2.1, and it is useful for large-scale setups. Aladdin [2] dominates the market for USB stick-based cryptographic access control
45%
Demystified: The facts about green IT
30.11.2025
Home »  Archive  »  2011  »  Issue 3: Are yo...  » 
Iakov Kalinin, 123RF
, and IZES Institut für ZukunftsEnergieSysteme (Institute for Future Energy Systems) GmbH [1] [2] investigated precisely this topic. The question the researchers set out to answer was: How economical
45%
Remote desktop based on HTML5
31.10.2025
Home »  Archive  »  2012  »  Issue 12: NAS S...  » 
© Phanlop Boonsongsomnukool, 123RF.com
quickly view the password hash at the command line with the md5sum utility: # echo -n | md5sum -t 319f4d26e3c536b5dd871bb2c52e3178 - Next, add this hash value instead of the password
45%
New approaches for forensics in cloud environments
30.11.2025
Home »  Archive  »  2011  »  Issue 5: Pen Te...  » 
illustrator, 123RF.com
on the cloud security problem and on corresponding legal issues [1]. This paucity of information was confirmed by other publications [2] [3]. Despite this, the topic is still largely overlooked and a huge amount
45%
Checking password complexity with John the Ripper
30.11.2025
Home »  Archive  »  2011  »  Issue 6: Perfor...  » 
for checking a password hash file against a password dictionary is very high. A hacker can recover dictionary-based passwords in minutes, whereas a brute force attack can take days. Brute force is a single-character-at-a
45%
Create a high availability VM with  DRBD9  and Reactor
07.10.2025
Home »  Archive  »  2025  »  Issue 89: Autom...  » 
Photo by Emma Simpson on Unsplash
://launchpad.net/~linbit/+archive/ubuntu/linbit-drbd9-stack LVM: https://sourceware.org/lvm2 Attribution-ShareAlike 3.0 Unported: https://creativecommons.org/licenses/by-sa/3.0/deed.en virter: https://github.com/LINBIT/virter Linstor: https ... DRBD9 and DRBD Reactor create a Linux high-availability stack for virtual instances with replicated storage comparable to the classic Corosync and Pacemaker solution. ... DRBD9 and DRBD Reactor ... Create a high availability VM with  DRBD9  and Reactor
45%
Introduction to OpenMP programming
31.10.2025
Home »  Archive  »  2012  »  Issue 12: NAS S...  » 
© Frank Rohde, 123RF.com
) ! Delta (x and y directions) ... 117 ! Solution Initialization 118 ! +++ !$OMP PARALLEL DO SHARED(m,n,u) 119 DO j=2,m-1 120 DO i=2,m-1 121 u(i,j)=0.0d0 122 ENDDO 123 ENDDO +++ !$OMP END
45%
A Btrfs field test and workshop
31.10.2025
Home »  Archive  »  2012  »  Issue 11: Cloud...  » 
© Adrian Hillman, 123RF.com
: Balancing can free up unneeded but assigned chunks. Running btrfs fi df and btrfs fi show – before and after balancing – show that the metadata chunk size has been reduced to 256MB; thus, 1.5GB (2x750MB ... SUSE has officially supported Btrfs in Service Pack 2 of its Enterprise Server 11 since February 2012. Oracle followed soon after with Btrfs support in its own Linux. We explore the possibilities

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