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The Resurrection of bWatch
02.06.2025
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Photo by NASA Hubble Space Telescope on Unsplash
-purpose, interpreted and dynamic Tool Command Language (Tcl) was created by John Ousterhout in the 1990s. From the name you can probably tell that it was intended to be a language for writing tools for whatever platform
18%
Cgroups for resource management in Linux
30.11.2025
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© Photographer, 123RF.com
cgroup, which has no restrictions. You can test this by sending a SIGUSR1 to the process: # kill -USR1 $pid 578804+0 records in 578804+0 records out 296347648 bytes (296 MB) copied, 7.00803 s, 42.3 MB/s
18%
Using a tablet as a portable management console
30.11.2025
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© Peter Bernik, 123RF.com
, somehow the signal could reach you. During the post-pager revolution (The 1990s), you received a new device that offered two-way communications: The ubiquitous cell phone. The cell phone could not only
18%
Intrusion detection with Prelude
30.11.2025
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© Chittima Kasa, 123RF.com
programs. This is not always the security solution's fault. An application that is not programmed carefully and fails to comply with RFCs can trip a SIEM signature. In this test, Prelude suspected a DoS
18%
Securing email communication with GnuPG
07.10.2025
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Photo by Amol Tyagi on Unsplash_Key.jpg
for different security requirements: GnuPG Desktop [3] and Gpg4win [4] are user-friendly desktop versions. GnuPG VS-Desktop [5] is available for particularly secure use in government agencies and companies
18%
Snapshot management for Azure VMs
28.07.2025
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Lead Image © meepiangraphic, 123RF.com
Config = New-AzVMConfig -VMName "" -VMSize "Standard_D2s_v3" vmConfig = Set -AzVMOSDisk -VM $vmConfig -ManagedDiskId $newDisk.Id -CreateOption Attach -Windows New-AzVM -ResourceGroupName"
18%
pfSense firewall and router distribution
30.11.2025
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© Sergey Mironov, 123RF.com
Protocol (CARP) is used in the background [3]. If needed, a pfSense installation can transfer its configuration to all other firewalls and then run pfsync to keep the state tables of all the active firewalls
18%
What tools do intruders use to
30.11.2025
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© Wojciech Kaczkowski, 123RF.com
, name servers, and network hosts accessible through the Internet. The popular whois service also offers a means for discovering domain information. The Nmap scanner's -sL option (nmap -sL) performs
18%
Security without firewalls
31.10.2025
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© rukanoga, 123RF.com
and then explicitly allow certain users access. It's similar to the deny by default approach I touched on in another article [3]. To achieve this, the /etc/hosts.deny file would look like this: sshd: ALL To allow
18%
System monitoring with Sysinternals
30.11.2025
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© Denis Tevekov, 123RF.com
lists all the processes in a window and includes more detailed information on the current process, such as access to directories (Figure 3). Figure 3

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