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Article (Print)
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100%
Monitoring network computers with the Icinga Nagios fork
30.11.2025
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Archive
»
2010
»
Issue 1: System...
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notification_interval 60 16 notification_options d 17 } 18 19 # Fileserver 20 define host{ 21 host_name fileserver
22
alias Fileserver 23
99%
ARP cache poisoning and packet sniffing
30.11.2025
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Archive
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2011
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Issue 6: Perfor...
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Destination MAC address Listing 1 Nemesis arp Packets 01 $ while true 02 > do 03 > sudo nemesis arp -v -r -d eth0 -S 192.168.1.2 -D 192.168.1.133 -h
00:22
:6E:71:04:BB -m
00
:0C:29:B2
98%
Using Expect scripts to automate tasks
31.10.2025
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Archive
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2012
»
Issue 12: NAS S...
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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
97%
A simple approach to the OCFS2 cluster filesystem
30.11.2025
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Archive
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2010
»
Issue 1: System...
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_dlm] root 3467 7 0 20:07 ?
00:00:00
[o2net] root 3965 7 0 20:24 ?
00:00:00
[ocfs2_wq] root 7921 7 0
22
:40 ?
00:00:00
[o2hb-BD5A574EC8] root 7935 7
88%
Checking password complexity with John the Ripper
30.11.2025
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Archive
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2011
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Issue 6: Perfor...
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, 378501 c/s virtual 18 Long: 1063K c/s real, 1063K c/s virtual 19 20 Benchmarking: LM DES [64/64 BS]... DONE 21 Raw: 8214K c/s real, 8214K c/s virtual
22
23 Benchmarking: NT MD4 [Generic 1x]... DONE 24
87%
Monitor your nodes with collectl
30.11.2025
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2012
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Issue 09: Windo...
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Commands = -f /var/log/collectl -r
00:00
,7 -m -F60 -s+YZCD --iosize These options allow me to monitor CPU, disk, and network in brief mode and slab, processes, and disk in detailed mode. I also added the ability
86%
Tested: Autoconfiguring IPv6 clients
30.11.2025
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Archive
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2011
»
Issue 5: Pen Te...
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, the MAC address (e.g.,
00:11:22
:33:44:55) is split down the middle, and two bytes containing FF:FE are inserted. This gives you 64 bits. If the basis is a globally unique address (which should be the case
86%
Give your servers the once over with Nmap
31.10.2025
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Archive
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2012
»
Issue 11: Cloud...
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.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
86%
An IT nomad's daily diary
30.11.2025
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2011
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Issue 6: Perfor...
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\ 02 --hostname=foo.bar.de --mac- address=
00
:40:26:CA:10:DD \ 03 --kopts="stage=test app=www" --ksmeta="stage=test app=www" 04 # cobbler system edit --name=foo --interface=eth0 --mac=
00
:40:26:CA
85%
Beyond monitoring: Mathematical load simulation in Perl
30.11.2025
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2011
»
Issue 6: Perfor...
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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
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