Question: explain these 5 firewall rules: iptables - A FORWARD - i eth 0 - d 1 9 2 . 1 6 8 . 6 0

explain these 5 firewall rules:
iptables -A FORWARD -i eth0-d 192.168.60.5-p tcp --dport 23--syn -j ACCEPT
iptables -A FORWARD -i eth1-p tcp --syn -j ACCEPT
iptables -A FORWARD -p tcp -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
iptables -A FORWARD -p tcp -j DROP
iptables -P FORWARD ACCEPT

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