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  • Article (Print) (153)
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16%
The fail2ban intrusion prevention framework
30.11.2025
Home »  Archive  »  2012  »  Issue 10: Traff...  » 
© Flavijus Piliponis, 123RF.com
by the regex complexity; thankfully, several solid examples are included at installation time. Fortunately, fail2ban is flexible – not just in the services it can monitor but also across different operating
16%
Debugging the Linux kernel with the Qemu emulator
30.11.2025
Home »  Archive  »  2012  »  Issue 07: Xen v...  » 
© Daniela Mangiuca, 123RF.com
is comparatively unproblematic, but if you freeze the kernel itself, you don't have a run-time environment that accepts keyboard input, outputs data to the monitor, accesses memory content, or continues running
16%
A standard cloud computing API
30.11.2025
Home »  Archive  »  2011  »  Issue 6: Perfor...  » 
are necessary for, say, pausing or removing a currently active VM. Figure 3: Functions for monitoring the specific status details of a VM instance are particularly
16%
Boost performance of your Python programs
30.11.2025
Home »  Archive  »  2010  »  Issue 2: Backup...  » 
Eric Isselée, 123RF
, or the channels could be added through the add method later. To determine whether an exchange is actually monitoring any channels and ready to see whether any data is ready to be received, you can use the active
16%
Virus scanner and content filter with AD authentication
30.11.2025
Home »  Archive  »  2010  »  Issue 0: Active...  » 
Denis Makarov, 123RF.com
users to log in to the proxy for monitoring purposes, making it possible to assign individual user or group privileges, such as access to the intranet or extranet. But logging in means adding another
16%
The RADOS object store and Ceph filesystem
30.11.2025
Home »  Archive  »  2012  »  Issue 09: Windo...  » 
© Brigida Soriano, Fotolia.com
. The hierarchy within the OSDs is flat: files with UUID-style names but no subfolders. Monitoring servers (MONs): MONs form the interface to the RADOS store and support access to the objects within the store
16%
Check your VoIP networks with SIPVicious and sngrep
30.11.2025
Home »  Archive  »  2025  »  Issue 90 VoIP N...  » 
Photo by Quino Al on Unsplash
. Jitter is usually measured in milliseconds and should not exceed 30ms on a VoIP network. You can use filters such as sip or rtp to improve clarity when carrying out real-time monitoring. Each phase
16%
Introduction to OpenMP programming
31.10.2025
Home »  Archive  »  2012  »  Issue 12: NAS S...  » 
© Frank Rohde, 123RF.com
application. Today, it's very easy to get laptops with at least two, if not four, cores. Desktops can easily have eight cores with lots of memory. You can also get x86 servers with 64 cores that access all
16%
Create a high availability VM with  DRBD9  and Reactor
07.10.2025
Home »  Archive  »  2025  »  Issue 89: Autom...  » 
Photo by Emma Simpson on Unsplash
is always a compromise, which is why Linstor lets you set up an arbiter node, also known as a quorum tiebreaker. It monitors both systems and is responsible for ensuring a quorum if the two cluster servers
16%
The PHP FastCGI process manager, PHP-FPM
31.10.2025
Home »  Archive  »  2012  »  Issue 12: NAS S...  » 
© conceptw, 123RF.com
. However, an interpreter process can (accidentally) overwrite or destroy the opcode cache. PHP-FPM therefore monitors the cache and restarts the process automatically if something seems to be going haywire

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