Doubt about forwarding. Please, Help me!

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Hello. I have a firewall blocking all the traffic from the Internet to my local network, but I need to let an external host (extHOST) to access the port 8888 (for example) of an internal host (intHOST). Is this correct? The external lan adapter is eth1.

 /sbin/iptables -t nat -A PORTFW -p tcp -i eth1 -s extHOST --dport 8888 -j DNAT --to-destination intHOST:8888

Thaks, please email me to cmmorales@xxxxxxxx 
Carlos




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