Use icmplib without root privileges

• Step 1: adapt your code

To use icmplib without root privileges, you must set the privileged parameter to False on the [ping] and [multiping] functions, as well as their asynchronous variants and the low level classes.

By disabling this parameter, icmplib let the kernel handle some parts of the ICMP headers.

The [traceroute] function does not have this parameter. It should always be run as root to receive ICMP Time Exceeded messages from gateways.

• Step 2: allow this feature on your operating system

On some Linux systems, you must allow this feature:

shell $ echo 'net.ipv4.ping_group_range = 0 2147483647' | sudo tee -a /etc/sysctl.conf $ sudo sysctl -p

You can check the current value with the following command:

shell $ sysctl net.ipv4.ping_group_range net.ipv4.ping_group_range = 0 2147483647

Since Ubuntu 20.04 LTS, this manipulation is no longer necessary.

[Read more about ping_group_range on www.kernel.org]