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17%
From Out of the Blue
30.11.2025
Home »  Archive  »  2011  »  Issue 3: Are yo...  » 
], which can yield a surprising number of vulnerabilities in a short amount of time. Many of the best "smart" (protocol- or format-aware) fuzzers, such as Sulley [11] or Peach [12] are well documented
17%
Intruder detection with tcpdump
30.11.2025
Home »  Archive  »  2012  »  Issue 07: Xen v...  » 
© Monika Wisniewska, 123RF.com
: Figure 4: Header bytes 12-15. # tcpdump -n -r dumpfile.lpc -c 10 'tcp[13] == 18' and host 172.16.183.2 Figure 5 is an example what this command returns. When capturing data with tcpdump, you can
17%
Nagios author Ethan Galstad
30.11.2025
Home »  Archive  »  2011  »  Issue 4: Secure...  » 
of Nagios and I released it. Honestly, I didn't think more than 10 or 12 people would use it. I didn't think anyone would find it interesting, but it started taking off and becoming very popular, and that
17%
Building a port scanner in Python
28.07.2025
Home »  Archive  »  2025  »  Issue 88: 5 Net...  » 
Lead Image © Leo Blanchette, 123RF.com
(socket.timeout, ConnectionRefusedError): 12 pass 13 14 def port_scanner(host, start_port, end_port, threads=10): 15 print(f"Scanning {host} from port{start_port} to {end_port}") 16 17 for port
17%
News for Admins
07.10.2025
Home »  Archive  »  2025  »  Issue 89: Autom...  » 
 
AMD64 and ARM64 HTTP Boot support in Debian Installer and Live images for UEFI/U-Boot systems Upgraded software stack: Gnome 48, KDE Plasma 6, Linux kernel 6.12 LTS, GCC 14.2, Python 3
17%
Quick patches with Ansible
27.05.2025
Home »  Archive  »  2025  »  Issue 87: Light...  » 
Lead Image © David Crockett, Fotolia.com
_ssh_private_key_file: /home/treuss/.ssh/pihole 09 ansible_user: thomas 10 # Gitea 11 raspi03: 12 ansible_ssh_private_key_file: /home/treuss/.ssh/raspi03 13 ansible_user: thomas 14
17%
Moving HPC to the cloud
31.10.2025
Home »  Archive  »  2012  »  Issue 11: Cloud...  » 
© Zarko Cvijovic, 123RF.com
of options, including dual four-core Xeon, dual six-core Xeon, or quad 12-core AMD processors ranging in speed from 2.2 to 2.9GHz with 24 to 128GB of RAM per server and up to 1TB of scratch local storage per
17%
Getting started with I/O profiling
30.11.2025
Home »  Archive  »  2012  »  Issue 08: FreeNAS  » 
© Photosani, Fotolia.com
to analyze I/O patterns is that you are getting the strace output from a single application. Because I'm interested in HPC storage here, many of the applications will be MPI [12] applications, for which you
17%
With great PowerShell comes great responsibility
30.11.2025
Home »  Archive  »  2012  »  Issue 09: Windo...  » 
© imagesource, 123RF.com
------- ------ ----- ----- ----- ------ -- ----------- 03 81 9 2392 3076 76 0.12 3996 AmIcoSinglun64 04 74 9 1464 2568 42 0.09 2172 armsvc 05 195 10 2380 2984 62 0
17%
Troubleshooting SELinux
30.11.2025
Home »  Archive  »  2010  »  Issue 0: Active...  » 
Sapsiwai, Fotolia
12). Listing 11 Error Message on Web Server Restart 01 # /etc/init.d/httpd start 02 Starting httpd: (13)Permission denied: make_sock: could not bind to address 0.0.0.0:8001 03

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