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  • Article (Print) (66)
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78%
Strategies for routing voice calls around a firewall
30.11.2025
Home »  Archive  »  2010  »  Issue 0: Active...  » 
gnohz, 123RF.com
.atlanta.com:5060; branch=z9hG4bKnashds8 03 Max-Forwards: 70 04 To: Bob 05 From: Alice ;tag=1928301774 06 Call-ID: a84b4c76e66710 07 CSeq: 314159 INVITE 08 Contact
78%
Security without firewalls
31.10.2025
Home »  Archive  »  2012  »  Issue 12: NAS S...  » 
© 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 ... 12
77%
Building a custom Cyberdeck
07.10.2025
Home »  Archive  »  2025  »  Issue 89: Autom...  » 
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
77%
A standard cloud computing API
30.11.2025
Home »  Archive  »  2011  »  Issue 6: Perfor...  » 
total = summary.values.inject(0) { |sum, i| sum += i } 12 puts "Found #{total} instances in the following states:" 13 summary.keys.sort.each do |s| 14 printf "%20s %d\n", s, summary[s] 15 end 16 puts
77%
Using the Expect scripting environment
30.11.2025
Home »  Archive  »  2011  »  Issue 5: Pen Te...  » 
© Ivan Mikhaylov, 123RF.com
expect { 09 "(yes/no)? " { 10 send "yes\r" 11 exp_continue 12 } 13 14 "word:" { 15 send "whatever\r" 16 send_tty "Key exchange needed with $host\n" 17 exp_continue 18
76%
Galera Cluster for MySQL
30.11.2025
Home »  Archive  »  2012  »  Issue 10: Traff...  » 
© Noel Powell, fotolia.com
temporarily with Listing 5 Error Messages sh: /sbin/ifconfig: Permission denied 120405 8:29:02 [ERROR] WSREP: Failed to read output of: '/sbin/ifconfig | \ grep -m1 -1 -E '^[a-z]?eth[0-9
75%
Server virtualization with Citrix XenServer
30.11.2025
Home »  Archive  »  2010  »  Issue 2: Backup...  » 
Goss Vitalij, Fotolia
processor cores. Depending on the functional scope, the prices are between US$ 1,000 and US$ 5,000, including 12 months of free upgrades, news, and information. For server virtualization newcomers, Citrix
75%
Creating and evaluating kernel crash dumps
31.10.2025
Home »  Archive  »  2012  »  Issue 11: Cloud...  » 
© Giuseppe Ramos, 123RF.com
kernel sles:~ # grep crash /proc/cmdline root=/dev/disk/by-uuid/10a83ffe-5a9f-48a2-b8cb-551c2cc6b42d resume=/dev/sda3 splash=silent text showopts crashkernel=128 sles:~ # /etc/init.d/boot.kdump status
75%
The next generation of Internet connectivity
30.11.2025
Home »  Archive  »  2011  »  Issue 3: Are yo...  » 
ktsdesign, 123RF.com
be done more efficiently. In the past, IPv4 addresses were assigned either as Class A (16 million), Class B (65 thousand), or Class C (256), which resulted in some very inefficient allocations (e
74%
Monitoring network computers with the Icinga Nagios fork
30.11.2025
Home »  Archive  »  2010  »  Issue 1: System...  » 
© Alterfalter, 123RF.com
powerful Icinga test server (Via C3, 800MHz, 256MB RAM). As a default, you need a new username and password for Icinga Web. That said, however, the current status does reveal some potential; it makes sense

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