Program to create word clouds of DNS traffic.
Quick start:
./pysniff.py eth0 dnslookups.txt
./cloud.py dnslookups.txt dnslookups.png
You will need to install some prereqs.
- pip3 install wordcloud
- pip3 install matplotlib
- pip3 install pcapy
- pip3 install scapy
First you will want to create a list of DNS lookups. To do that run sniff.py INTERFACE OUTFILE
dnsCloud joe$ ./pysniff.py --help
usage: pysniff.py [-h] [--pid] interface outfile
DNS Word Cloud Image Generation
positional arguments:
interface Network Interface
outfile DNS log file
optional arguments:
-h, --help show this help message and exit
--pid Create a pid file in /var/run/pysniff.pid
To listen on en0 and create a file with DNS lookups called dnslookups.txt run:
dnsCloud joe$ sudo ./sniff.py en0 dnslookups.txt
You can then create a word cloud using cloud.py INFILE OUTFILE .
dnsCloud joe$ ./cloud.py -h
usage: cloud.py [-h] [--bgimage BGIMAGE] infile outfile
DNS Word Cloud Image Generation
positional arguments:
infile Source file
outfile Destination image file
optional arguments:
-h, --help show this help message and exit
--bgimage BGIMAGE Optional image filei to shape around
To create a wordcloud using the file dnslookups.txt and an image dnslookups.png run:
dnsCloud joe$ ./cloud.py dnslookups.txt dnslookups.png
Source file: dnslookups.txt
Output file: dnslookups.png
I run this out of cron. first create your crontab.
$crontab -e
*/5 * * * * /home/joe/cloud.py /data/dnsqueries.txt /var/www/html/dnscloud/wordcloud.png
Then have sniff.py start on boot.
$vi /usr/lib/systemd/system/pysniff.service #Startup file for pysniff.pif #run systemctl enable pysniff.service
[Unit]
Description=Python DNS Sniffing Service
After=multi-user.target
[Service]
type=oneshot
PIDFile=/var/run/pysniff.pid
WorkingDirectory=/root
ExecStart=/root/pysniff.py eno2 /data/dnsqueries.txt --pid
RestartSec=10s
Restart=always
ExecReload=/bin/kill -s HUP $MAINPID
ExecStop=/bin/kill -s TERM $MAINPID
[Install]
WantedBy=multi-user.target
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