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18%
New versions of the Endian and Sophos UTM solutions
20.05.2014
Home »  Archive  »  2014  »  Issue 20: IPv6...  » 
Lead Image © Dmitriy Cherevko, 123RF.com
is available from the company's website [3]. For companies, Sophos also offers the Essential Firewall, a free version which, however, again only provides basic security functions. Except for the DNS proxy
18%
Troubleshooting and analyzing VoIP networks
06.10.2019
Home »  Archive  »  2019  »  Issue 53: Secur...  » 
Lead Image © Ioannis Kounadeas, Fotolia.com
problems on Open Systems Interconnection (OSI) model Layer 2 or 3 is almost trivial compared with VoIP analysis. In Internet telephony, the sources of error migrate to higher OSI Layers 4 through 7. Vo
18%
The practical benefits of network namespaces
15.08.2016
Home »  Archive  »  2016  »  Issue 34: Softw...  » 
Lead Image © Morganimation, fotolia.com
Linux Containers (LXC) [1] and Docker [2], as well as software-defined network (SDN) solutions [3], make extensive use of Linux namespaces, which allow you to define and use multiple virtual
18%
CPU affinity in OpenMP and MPI applications
03.02.2022
Home »  Archive  »  2022  »  Issue 67: syst...  » 
Lead Image © podfoto, 123RF.com
serial, OpenMP, OpenACC, and MPI code. I carefully watch the load on each core with GkrellM [3], and I can see the scheduler move processes from one core to another. Even when I leave one to two cores free
18%
openlava – Hot resource manager
31.10.2025
Home »  Archive  »  2012  »  Issue 12: NAS S...  » 
© Konrad Bak, 123RF.com
to pay attention to a few gotchas. (In my first attempt, I didn't pay attention to these.) In the next sections, I'll walk through the installation of openlava on a cluster (the Warewulf-based cluster [3
18%
Getting started with I/O profiling
30.11.2025
Home »  Archive  »  2012  »  Issue 08: FreeNAS  » 
© Photosani, Fotolia.com
to do, but some basic tools can help you. For example, tools such as sysstat utilities sar, iostat, and nfsiostat [1]; iotop [2]; and collectl [3] can be used to help you measure your I/O usage. (This
18%
Building more efficient database applications with a graph database
30.11.2025
Home »  Archive  »  2012  »  Issue 08: FreeNAS  » 
© Jakub Krechowicz, 123RF.com
://neo4j.org http://www.sones.de/static-en/ http://www.infogrid.org http://www.hypergraphdb.org http://www.dekorte.com/projects/opensource/vertexdb/ License GPLv3
18%
Configuration management with Chef
30.11.2025
Home »  Archive  »  2010  »  Issue 1: System...  » 
© Alistair Cotton, 123RF.com
-certs, make, gcc, and g++. The certificates from ssl-cert will be required later. According to the how-to http://1, Chef prefers RubyGems version 1.3.6 or newer, but not 1.3.7. This version contains a bug
18%
Working with the Lustre Filesystem
24.02.2022
Home »  HPC  »  Articles  » 
to which they are written. Lustre (or Linux Cluster) [1]-[3] is one such distributed filesystem, usually deployed for large-scale cluster high performance computing (HPC). Licensed under the GNU General
18%
Forensic Tools
04.02.2014
Home »  Articles  » 
 
(OSForensics). The registry entry under Software\Microsoft\InternetExplorer\TypedURLs contains the last URL entries from the IE address bar (Figure 3

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