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85%
Targeted defense against brute force attacks
30.11.2025
Home »  Archive  »  2011  »  Issue 3: Are yo...  » 
Andrii IURLOV, 123RF.com
on your whitelist, just add more -w options: sudo sshguard -l /var/log/auth.log -w 192.168.0.101 -w 192.168.0.102 -w 192.168.0.103 You can use CIDR notation for an address range. The following example
84%
Fundamentals of I/O benchmarking
11.04.2016
Home »  Archive  »  2016  »  Issue 32: Measu...  » 
Lead Image © Kheng Ho Toh, 123RF.com
KiB blocks: 79.2 IO/s, 1.2 MiB/s ( 10.4 Mbit/s) 32 KiB blocks: 81.8 IO/s, 2.6 MiB/s ( 21.4 Mbit/s) 64 KiB blocks: 78.0 IO/s, 4.9 MiB/s ( 40.9 Mbit/s) 128 KiB blocks: 76.0 IO/s, 9
84%
Monitoring network computers with the Icinga Nagios fork
30.11.2025
Home »  Archive  »  2010  »  Issue 1: System...  » 
© Alterfalter, 123RF.com
to check how the new interface is developing from time to time. Figure 5: Icinga Web beta was not entirely convincing. Version 1.0.3 is out now
83%
OpenVPN with e-tokens in large-scale environments
30.11.2025
Home »  Archive  »  2011  »  Issue 5: Pen Te...  » 
© sTan, fotolia.com
13 pkcs11-id 'Aladdin\x20Knowledge\x20Systems\x20Ltd\xxx/eToken/0000xxxx/eToken\xxx\xxx\xxxxxx/xxxx' 14 15 management 127.0.0.1 4711 16 management-query-passwords 17 18 cipher BF-CBC 19 comp-lzo 20
83%
Creating an SFTP jail
30.11.2025
Home »  Archive  »  2011  »  Issue 3: Are yo...  » 
Juan Manuel Ordonez, 123RF.com
/export/home/jail/$JAILUSER/etc/group 102 103 echo "$JAILUSER:x:`/usr/xpg4/bin/id -u $JAILUSER`:`/usr/xpg4/bin/id-g $JAILGROUP`::/home/$JAILUSER:/bin/sh" > \ 104 /export
83%
A watchdog for every modern *ix server
25.09.2023
Home »  Archive  »  2023  »  Issue 77: Secur...  » 
Photo by Sudhith Xavier on Unsplash
/null 2>&1 022 then 023 echo " Error: required command ${c} not found, exiting ..." 024 exit 1 025 fi 026 done 027 028 } 029 030 instlMonit() { 031 032 if ! wget "https://mmonit.com/monit/dist/binary/${MONITVER}/monit-${MONITVER}-linux-x
82%
Automating command execution across servers
01.06.2024
Home »  Archive  »  2024  »  Issue 81: Load...  » 
Photo by Adrian Hartanto on Unsplash
# A single task is defined, which by default will 20 # run only against "devuan" hosts. 21 tasks: 22 upgradeall: 23 desc: Upgrade all packages 24 target: 25 tags: [devuan] 26 cmd: | 27
82%
Minifying container images with DockerSlim
04.08.2020
Home »  Archive  »  2020  »  Issue 58: Graph...  » 
Lead Image © Maggie Molloy, 123RF.com
, what would you say if I told you that you could automatically reduce the size of your Docker images 30x? Why are smaller container images a good thing? When it comes to containers, less is more: Your ... DockerSlim minifies your Docker container images up to 30x and adds security, too.
81%
SSL/TLS best practices for websites
07.10.2014
Home »  Archive  »  2014  »  Issue 23: 10 Ti...  » 
Lead Image © Yevgeniya Ponomareva, Fotolia.com
as reliably as the rest of the PKI world. 4. Protocols A public website must support the TLS 1.0, TLS 1.1, and TLS 1.2 protocols. SSL 2 is obsolete and insecure. SSL 3 is also deprecated and, although
81%
Update your Docker containers safely
07.06.2019
Home »  Archive  »  2019  »  Issue 51: Self-...  » 
Lead Image © yelenayemchuk, 123RF.com
this script, please let me know, preferably in Python 06 # hanscees@AT@hanscees.com 07 # modified from https://gist.github.com/cirocosta/17ea17be7ac11594cb0f290b0a3ac0d1x 08 09 set -o errexit 10 11 main() { 12

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