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44%
ARP cache poisoning and packet sniffing
30.11.2025
Home »  Archive  »  2011  »  Issue 6: Perfor...  » 
© elisanth, 123RF.com
traffic normally unavailable because of layer 2 switching. Arpspoof [3] is much simpler than ettercap for redirecting packets: # arpspoof -i eth0 -t host Specifying the interface is optional
44%
Processing the new sudo logging format
26.03.2025
Home »  Archive  »  2025  »  Issue 86: Data...  » 
Photo by Kelly Sikkema on Unsplash
to a file: { "accept": { "server_time": { "seconds": 1716370731, "nanoseconds": 137298080, "iso8601": "20240522093851Z", "localtime": "May 22 09
43%
Strategies for routing voice calls around a firewall
30.11.2025
Home »  Archive  »  2010  »  Issue 0: Active...  » 
gnohz, 123RF.com
14 15 v=0 16 o=alice 53655765 2353687637 IN IP4 20.22.24.27 17 s=- 18 t=0 0 19 c=IN IP4 20.22.24.27 20 m=audio 20333 RTP/AVP 0 1 3 99 21 a=rtpmap:0 PCMvU/8000 The RTP port causes the next issue ... 0
43%
Mandatory access control with Tomoyo Linux
30.11.2025
Home »  Archive  »  2012  »  Issue 09: Windo...  » 
© 3drenderings, 123RF.com
2.2.x. 2.6.30 through 2.6.35 Debian 6 (Squeeze) 2.3.x. 2.6.36 through 3.0 Ubuntu 11.10 2.4.x. 3.1. openSUSE 12.1 2.5.x. 3
43%
Building a port scanner in Python
28.07.2025
Home »  Archive  »  2025  »  Issue 88: 5 Net...  » 
Lead Image © Leo Blanchette, 123RF.com
installed on your system. If Python is not installed, you can install it with: sudo apt install python3 With VS Code and the necessary extensions set up, you are now ready to start developing your port
43%
Dispatches from the world of IT
30.11.2025
Home »  Archive  »  2011  »  Issue 4: Secure...  » 
 
gas prices. The company announced its VMware Ready Desktop Solutions program on June 22. Ready Desktop Solutions is a validation program for "desktop virtualization solution architectures" provided
43%
Beyond monitoring: Mathematical load simulation in Perl
30.11.2025
Home »  Archive  »  2011  »  Issue 6: Perfor...  » 
© kudryashka, 123RF.com
Model"; 11 $work = "ebiz-tx"; 12 $node1 = "WebServer"; 13 $node2 = "AppServer"; 14 $node3 = "DBMServer"; 15 $think = 0.0 * 1e-3; # as per test system 16 $dtime = 2.2 * 1e-3; # dummy service time 17 18
43%
Netcat – The admin's best friend
31.10.2025
Home »  Archive  »  2012  »  Issue 12: NAS S...  » 
© Dmitry Rukhlenko, 123RF.com
seconds, for example: # nc -p 16000 -w 30 examplehost.tld 22 If firewalling is in place and you need to originate your connection from a specific IP address to open a port, then you can enter: # nc -s 1.2.3
43%
Using Expect scripts to automate tasks
31.10.2025
Home »  Archive  »  2012  »  Issue 12: NAS S...  » 
© Kheng Ho Toh, 123RF.com
% of 454.22GB Processes: 168\r 60 Memory usage: 22% Users logged in: 1\r 61 Swap usage: 0% IP address for eth0: 192.168.1.250\r 62 \r 63 Graph this data
43%
The fail2ban intrusion prevention framework
30.11.2025
Home »  Archive  »  2012  »  Issue 10: Traff...  » 
© Flavijus Piliponis, 123RF.com
the smoke and mirrors that some pieces of software employ to keep their workings secret, fail2ban is transparent in the work it does behind the scenes. In simple terms, fail2ban [3] keeps a close eye on your

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