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30%
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
30%
Failure to Scale
03.07.2013
Home »  HPC  »  Articles  » 
speedup, n is the number of processors, and p is the parallel fraction, or the fraction of the application that is parallelizable (0 to 1). In an absolutely perfect world, the parallelizable fraction
30%
Pre-authentication for Kerberos services
04.04.2023
Home »  Archive  »  2023  »  Issue 74: The F...  » 
Photo by pina messina on Unsplash
. For practical use, you first need to call kinit with the -n option to give you an anonymous TGT: kinit -n klist Ticket cache: KCM:0 Default principal: WELLKNOWN/ANONYMOUS@WELLKNOWN:ANONYMOUS [...] You can now
30%
Setting up FreeNAS
17.02.2015
Home »  Archive  »  2015  »  Issue 25: Safe...  » 
Lead Image © Franck, 123RF.com
NAS Early versions of FreeNAS originate from the embedded firewall project m0n0wall, and the software has since undergone a complete metamorphosis. The current version is built on powerful open source
30%
Graphite: Collect and Visualize Numeric Data
30.07.2014
Home »  HPC  »  Articles  » 
 => SOCK_STREAM)     or die "Couldn't connect to $remote_host:$remote_port: $@ \n";     while() {  my @lavg = Sys::CpuLoad::load();  my $ts=time();  print $socket "system.loadavg_1min $lavg[0] $ts\n";  print
30%
Get the best out of your bandwidth with tc
30.11.2025
Home »  Archive  »  2012  »  Issue 10: Traff...  » 
© Russell Shively, 123RF.com
25Mbit allot 1514 cell 8 weight 2500Kbit prio 3 \maxburst 20 avpkt $PKT bounded 16 # Now add filters to your child class 17 tc filter add dev $DEV protocol ip parent 1:0 prio 100 u32 match ip $DIR 12
30%
Visualize data throughput with SMBTA
30.11.2025
Home »  Archive  »  2011  »  Issue 3: Are yo...  » 
Qi Feng, 123RF.com
've not been able to discover how enterprise environments are planning to cope with this problem. Infos SMBTA to be integrated with Samba 3.6 : http://samba.org/samba/ftp/pre/WHATSNEW-3-6-0pre1.txt ... 3
30%
History and use of the mail utility
05.12.2014
Home »  Archive  »  2014  »  Issue 24: Visua...  » 
Lead Image © Vlad Kochelaevskiy, fotolia.com
[<-] 334 VXNlcm5hbWU6 [->] Y2hyaXNiaW5uaWUzQGdtYWlsLmNvbQ== [<-] 334 UGFzc3dvcmQ6 [<-] 235 2.7.0 Accepted [->] MAIL FROM: [<-] 250 2.1.0 OK t2fjm4427fd213ply.2523 - gsmtp [->] RCPT TO
30%
DNSSEC-aware DNS caching with Unbound
01.08.2019
Home »  Archive  »  2019  »  Issue 52: Stop...  » 
Lead Image © Antonella Grandoni , Fotolia.com
secure-by-design stance. Unbound is a modern successor to Dan Bernstein's djbdns [3], because its design is focused on security and it includes DNSSEC. Developer NLnet Labs describes Unbound
30%
HPC Software Road Gets a Bit Smoother
10.09.2013
Home »  HPC  »  Articles  » 
are treated as single entities from an MPI viewpoint). The flexibility to run a program on N nodes (N ≥ 1 ), with C cores per node (C ≥ 1 ), and A accelerators per core (A ≥ 0 ) should be the goal of any ... New OpenMP 4.0 Spec

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