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25%
Denial of service defense
26.03.2025
Home »  Archive  »  2025  »  Issue 86: Data...  » 
Lead Image © Russell Shively, 123RF.com
a full HTTP request directly to the server, Slowloris begins a request and then continuously, but very slowly, adds headers without ever completing the request; (3) the server fields all of the header data
25%
Building sustainably safe containers
02.02.2021
Home »  Archive  »  2021  »  Issue 61: Secur...  » 
Lead Image © it studiom1, 123RF.com
dockerrepo.matrix.dev/gentoo-glibc:latest-amd64 && touch pushtime Sending build context to Docker daemon 21.12MB Step 1/2 : FROM dockerrepo.matrix.dev/gentoo-base:latest ---> 22fe37b24ebe Step 2/2 : ADD
25%
ClusterHAT
10.07.2017
Home »  HPC  »  Articles  » 
with the original Raspberry Pi Model A, ranging from two to more than 250 nodes. That early 32-bit system had a single core running at 700MHz with 256MB of memory. You can build a cluster of five RPi3 nodes with 20
25%
Preload Trick
11.05.2021
Home »  HPC  »  Articles  » 
.50GHz Processor base frequency 2.5GHz Max turbo frequency 4.5GHz Cache 8MB Four cores (eight with hyper-threading) 45W TDP 8GB DDR4-2933 memory Maximum of two memory channels
25%
Linux nftables packet filter
30.01.2020
Home »  Archive  »  2020  »  Issue 55: AWS L...  » 
Lead Image © alphaspirit, 123RF.com
The Linux kernel already contains a variety of packet filters, starting with ipfwadm and followed by ipchains and iptables. Kernel 3.13 saw the introduction of nftables [1], which uses the nft tool
24%
Netcat – The Admin’s Best Friend
20.08.2012
Home »  Articles  » 
 
examplehost.tld 22 If firewalling is in place and you need to originate your connection from a specific IP address to open a port, entering # nc -s 1.2.3.4 examplehost.tld 8181 will connect to examplhost
24%
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
24%
Why Good Applications Don’t Scale
13.10.2020
Home »  HPC  »  Articles  » 
be parallelized). For one process, the wall clock time is assumed to be 1,000 seconds, which means that 200 seconds of the wall clock time is the serial portion of the application. From Amdahl’s Law, the minimum
24%
Real-time log inspection
02.02.2021
Home »  Archive  »  2021  »  Issue 61: Secur...  » 
Lead Image © bowie15, 123RF
the configuration file that I created, replacing the top stanza with my specific Apache logfile format. Listing 3 log_format in Config File # 68.XXX.XXX.XXX - - [22/Nov/2020:11:03:36 +0100] "GET /wp
24%
Setting up SELinux policies
12.09.2013
Home »  Archive  »  2013  »  Issue 16: Docker  » 
Lead Image © Agustin Paz, 123RF.com
see that the base module is by far the largest, weighing in at more than 200KB. When a module is loaded, it is copied to /etc/selinux/targeted/modules/active/modules/. When the system is rebooted

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