This is the firewall tool in Linux.

The default table it uses is filter.

To empty a table:

iptables -t nat -F

To list all rules in a table:

iptables -t nat -L -n

Forward packet

iptables -t nat -A PREROUTING -d 192.168.0.110 -p tcp --dport 80 -j DNAT --to-destination 192.168.0.105
iptables -t nat -A POSTROUTING -d 192.168.0.105 -p tcp --dport 80 -j SNAT --to 192.168.0.110

Other options

-i can be used to identify the input network interface.
-j can be used to identify the output network interface.