Documentation on the Wireshark wiki seems to not be really up to date, or at least it’s not completely applicable to Fedora 18, so here is what I did to make it work.
After installing Wireshark (and its GUI) with the usual:
yum install wireshark-gnome
It should automatically create a group called “wireshark” and we are supposed to add our user (mafio in my case) to this group:
usermod -a -G wireshark mafio newgrp wireshark ### used to force the new settings without having to logout/login
Then issue this last command:
setcap cap_net_raw,cap_net_admin=eip /usr/sbin/dumpcap getcap /usr/sbin/dumpcap ### used to check file capabilities
This is it, now Wireshark should be able to sniff network packets without needing to be executed as root.