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Build a honeypot with real-world alerts
01.08.2019
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Lead Image © Bruce Rolff, 123RF.com
. The takeaway is the -j LOG option (line 12), which logs port scanning behavior to a logfile with the iptables: prefix. Listing 1 iptable Rules 01 *filter 02 *filter 03 :INPUT ACCEPT [0:0] 04
21%
What Is an Inode?
23.03.2022
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 laytonjb laytonjb 19946519 Nov 20  2020 Lmod-8.4.15.tar.gz 31988342 drwxrwxr-x   2 laytonjb laytonjb     4096 Oct 27 14:22 mpibzip2-0.6 31988329 -rw-rw-r--   1 laytonjb laytonjb    92160 Oct 27 14:18 mpibzip
21%
Modern Fortran for today and tomorrow
17.06.2017
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Lead Image © homestudio, 123RF.com
real :: diameter 08 real :: radius 09 real :: area 10 end type meta_data 11 12 contains 13 subroutine meta_comp(r, item) 14 type(meta_data) :: item 15 item%diameter = 2.0
21%
Cross-Vendor IPsec
25.10.2011
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authentication_algorithm pre_shared_key; 08 dh_group modp1024; 09 } 10 generate_policy off; 11 } 12 13 sainfo address 192.168.2.0/24 any address 172.16.0.0/16 any { 14 pfs_group modp1024; 15
21%
Extending OpenNebula with hooks
09.01.2013
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Lead Image © Greg Epperson, Photocase.com
=/var/log/one/accounting.log 04 05 case "$1" in 06 "on"|"off") 07 mode=$1 08 shift 09 ;; 10 *) 11 echo "$0 error: wrong mode." >&2 12 exit 1 13 ;; 14 esac 15 16 if [ "$1
21%
Visualizing containers with clarity
29.09.2020
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Lead Image © Ulrich Müller, 123RF.com
. /app 09 WORKDIR /app 10 ENV NODE_ENV production 11 RUN yarn install 12 13 CMD ["node", "index.js"] If Docker Engine is not installed on your machine, before building a local docker image you can
21%
Nagios alerts implemented via VoIP
14.03.2013
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© Zentilia, 123RF.com
=/opt/pjsua.conf 06 SOUNDFILE=/tmp/alert.wav 07 TEXT2WAVE=/usr/bin/text2wave 08 DURATION=20 09 NUMBER=01234567890 10 MESSAGE="Monitoring Alert" 11 12 # Setting a lock file 13 # We can't make more than one call 14
21%
Interprocess communication essentials in Perl
05.12.2019
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Lead Image © Carsten Reisinger, 123RF.com
print WRITEHANDLE "Here is some text"; 11 close(WRITEHANDLE); 12 waitpid($processed, 0); 13 } else { 14 close(WRITEHANDLE); 15 while (defined($text = )) { 16 print $text; 17
21%
The practical benefits of network namespaces
15.08.2016
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Lead Image © Morganimation, fotolia.com
,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 09 inet 192.168.1.123/24 scope global eth1 10 valid_lft forever preferred_lft forever 11 12 $ ip netns exec ns1 ip route add default
21%
Detecting malware with Yara
09.10.2017
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Lead Image © Mohamad Razi Bin Husin, 123RF.com
= "A pdf file that contains a bad link" 10 11 strings: 12 $pdf_magic = {68 47 77 22} 13 $s_anchor_tag = "0 and (#s

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