Installation and configuration
Next, you need to edit the configuration file (
/etc/conf.d/ntop) to adapt on your needs. Below is an example configuration, with the focus on the host to get as much as information from the hosts connections:
# Parameters to be passed to ntop. NTOP_ARGS="-K -W 2323 -i enp1s0,wlp2s0 -M -s -4 -6 -s -u ntop -c -r 30 -w3c -t 3 -a /var/log/ntop/http.log -O /var/log/ntop/ -q --skip-version-check 0" # Location of the log file. NTOP_LOG="/var/log/ntop/ntop.log"
Start the ntop systemd service and if you want to start ntop at boot, enable it.
Tips and tricks
To access ntop's web interface, enter http://127.0.0.1:3000/ into your web browser. To make changes to the server, you will need to enter your username (default = admin) and password.
If ntop is not just used locally on your machine, but network wide by multiple users, you'd be better off by allowing SSL connections (https) only.
# ntop -w 4223
Additional paramethers are allowed. Now direct our browser to https://127.0.0.1:4223/.
You can also provide ntop with your own SSL certificate. Simply put it in ntop's config directory and name it ntop-cert.pem
# cd /etc/ntop/ # openssl req -x509 -nodes -days 365 \-subj '/C=US/L=Portland/CN=swim' \-newkey rsa:1024 -keyout ntop-cert.pem -out ntop-cert.pem
Group and user
In order that the -u parameter is able to work properly and to secure your ntop setup a bit more, you should create an own group and user for it.
# useradd -M -s /sbin/nologin ntop # passwd -l ntop
**ERROR** RRD: Disabled - unable to create base directory (err 13, /var/lib/ntop/rrd)
/var/lib/ntop/rrd/ may not exist. Create it and make sure it belongs to user nobody.
Please enable make sure that the ntop html/ directory is properly installed
If you receive this warning while trying to access the web interface, edit
/etc/conf.d/ntop to include your IP and restart the daemon. For example:
NTOP_ARGS="-i enp1s0 -w 127.0.0.1:3000"
This is the IP you will use to access the web interface.