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Netcat – The admin's best friend
31.10.2025
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© Dmitry Rukhlenko, 123RF.com
'll take a quick look at a TCP port range. For example, you might want to use netcat (nc) to check FTP ports – or at least ports in that region: # nc -v -z examplehost.tld 21-25 If you want to change
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Using Expect scripts to automate tasks
31.10.2025
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© Kheng Ho Toh, 123RF.com
conservatively originally 21 if {$force_conservative} { 22 set send_slow {1 .1} 23 proc send {ignore arg} { 24 sleep .1 25 exp_send -s -- $arg 26 } 27 } 28
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Live migration of virtual machines on Hyper-V
31.10.2025
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© Anna Omelchenko, 123RF.com
on Linux servers. Windows 8 and Windows Server 2012 introduce the new SMB protocol 2.2. It accelerates access to data on the network that has normally been stored locally, such as SQL Server databases
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Give your servers the once over with Nmap
31.10.2025
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© ragsac, 123RF.com
.nmap.org (64.13.134.52): Not shown: 994 filtered ports PORT STATE SERVICE VERSION 22/tcp open ssh OpenSSH 4.3 (protocol 2.0) 25/tcp closed smtp
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Linux small business servers compared
31.10.2025
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© Umzugskartons, fotolia.
. Unfortunately, version 2.2, available since September 2011, is no longer up to date as far as software packages are concerned, which in some cases could lead to weaknesses in security. Version 2.2 runs on top
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Building a custom Cyberdeck
07.10.2025
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Lead Image © Lucy Baldwin, 123RF.com
RAM to 8GB and CPU speed to 2.4GHz – from 4GB and 1.8GHz, respectively, in the Pi 400. The core design was also upgraded from the ARM Cortex-A72 to Cortex-A76
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Dispatches from the world of IT
31.10.2025
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of the applications (22 percent) of the firms surveyed are currently hosted in the cloud. Additionally, 28 percent of testing now occurs in a cloud environment, and the report forecasts this to increase to 39 percent
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Successful automatic service detection
31.10.2025
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© Dmitriy Denysov, 123RF.com
fingerprinting. The following command executes a simple port scan on a chosen system: nmap -v -A www.haribo.de An abridged version of the output from this command is shown in Listing 1. It shows the standard
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Security without firewalls
31.10.2025
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© rukanoga, 123RF.com
's usually TCP port 22) to port 2222, for example, to keep port scans from filling up your logs. Without TCP Wrappers enabled, scans might run dictionary attacks on your server where password combinations
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Compressed Archives for User Projects
11.08.2025
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