1 iptables -t filter -A INPUT -j LOG
2 iptables -t filter -A INPUT -j LOG --log-prefix 'foo bar'
3 iptables -t filter -A INPUT -j LOG --log-prefix 'foo;bar'
4 iptables -t filter -A INPUT -j LOG --log-prefix foo{}bar
5 iptables -t filter -A INPUT -j LOG --log-tcp-sequence --log-tcp-options --log-ip-options