Iptables redirect port 3000 to port 80

iptablesrc

# sudo iptables -t nat -I PREROUTING -p tcp --dport 80 -j REDIRECT --to-ports 3000 
# sudo iptables -t nat -I OUTPUT -p tcp -d 127.0.0.1 --dport 80 -j REDIRECT --to-ports 3000

sudo iptables -t nat -A OUTPUT -d localhost -p tcp --dport 80 -j REDIRECT --to-port 3000

# Save iptables to file
sudo bash -c "iptables-save -c > /etc/iptablesrc"

# Apply localhost redirect saved in iptablesrc on system start
# sudo bash -c "iptables-restore < /etc/iptablesrc"
alias iptrest='sudo bash -c "iptables-restore < /etc/iptablesrc"'