List:

sudo iptables-save

Add:

sudo iptables -t nat -A PREROUTING -i eth0 -p tcp -m tcp --dport 3000 -j DNAT --to-destination 10.205.48.65:3000

Save:

sudo netfilter-persistent save

Delete/Remove:

sudo iptables -t nat -D PREROUTING -i eth0 -p tcp -m tcp --dport 3000 -j DNAT --to-destination 10.205.48.65:3000