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25%
TCP Stealth hides open ports
10.04.2015
Home »  Archive  »  2015  »  Issue 26: OpenS...  » 
Lead Image © momo5287, 123RF.com
if (setsockopt(sock, IPPROTO_TCP, TCP_STEALTH, secret, sizeof(secret))) { 08 printf("setsockopt() failed, %s\n", strerror(errno)); 09 return 1; 10 } 11
25%
Getting the most from your cores
11.10.2016
Home »  Archive  »  2016  »  Issue 35: Persi...  » 
Lead Image © ktsdesign, 123RF.com
, the exact details of these components varies from processor to processor, making CPU utilization comparison difficult. Current processors can have shared L3 caches across all cores or shared L2 and L1 caches
25%
Embarrassingly parallel computation
01.06.2024
Home »  Archive  »  2024  »  Issue 81: Load...  » 
Lead Image © Lucy Baldwin, 123RF.com
is considered "embarrassingly parallel" [3] where no design effort is required to partition the problem into completely separate parts. If no data dependency exists between the problem sub-parts, no communication
25%
StarCluster Toolkit: Virtualization Meets HPC
16.01.2013
Home »  HPC  »  Articles  » 
 name 05 #$ -N pi 06 # Use current working directory 07 #$ -cwd 08 # Join stdout and stderr 09 #$ -j y 10 # PARALLEL ENVIRONMENT: 11 #$ -pe orte 2 12 # Enable resource reservation 13 #$ -R y 14 # The max
25%
Cross-Vendor IPsec
25.10.2011
Home »  Articles  » 
 
-algorithm sha1; 07 encryption-algorithm 3des-cbc; 08 } 09 policy test123 { 10 mode main; 11 proposals Phase1-3des-sha; 12 pre-shared-key ascii-text "$9$dQVgJiHmTF/.PO1Ehrlgoa
24%
Secure access to Kubernetes
25.03.2020
Home »  Archive  »  2020  »  Issue 56: Secur...  » 
Lead Image © Zachery Blanton, 123RF.com
GVzLmlvL3NlcnZpY2VhY2NvdW50L3NlcnZpY2UtYWNjb3VudC51aWQiOiJiNDVhMDhjMi1kMzg1LTQxMmItOTUwNS02YmRmODdiNjRhN2EiLCJzdWIiOiJzeXN0ZW06c2VydmljZWFjY291bnQ6ZGVmYXVsdDp0ZXN0c2VydmljZWFjY291bnQifQ.SO9XwM3zgiW6sOfEaJx1P6
24%
Building a HPC cluster with Warewulf 4
04.04.2023
Home »  Archive  »  2023  »  Issue 74: The F...  » 
Photo by Andrew Ly on Unsplash
.pool.ntp.org driftfile /var/lib/chrony/drift makestep 1.0 3 rtcsync allow 10.0.0.0/8 local stratum 10 keyfile /etc/chrony.keys leapsectz right/UTC logdir /var/log/chrony I pointed the head node to 2.rocky
24%
Warewulf 4 – Time and Resource Management
17.01.2023
Home »  HPC  »  Articles  » 
lines I changed the name of the compute node to match my node (n0001 ). Listing 3: Edit the Template File $ sudo perl -pi -e "s/ControlMachine
24%
Manage OpenVPN keys with Easy-RSA
06.10.2019
Home »  Archive  »  2019  »  Issue 53: Secur...  » 
Lead Image © Orlando Rosu, 123rf.com
the Debian-based, distributions install it along with openvpn – one exception being Ubuntu, which only offers easy-rsa starting with Cosmic Cuttlefish (Ubuntu version 18.10) [3]. The successor, Easy-RSA 3
24%
Udev with virtual machines
14.11.2013
Home »  Archive  »  2013  »  Issue 17: Cloud...  » 
Lead Image © orangeline, 123RF.com
kernel ordinal number (%n). Listing 3 70-persistent-net.rules Rules for KVM: SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="52:54:00:*", KERNEL=="eth*", NAME="eth%n" Rules

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