[Unit]
Description=Snort IDS system listening on '%I'

[Service]
Type=forking
ExecStartPre=/sbin/ip link set up dev %i
ExecStart=/usr/bin/snort -A fast -b -l /var/log/snort -D -p -u snort -g snort -c /etc/snort/snort.conf -i %i

[Install]
Alias=multi-user.target.wants/snort@eth0.service