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I'm reformulating the question, once the previous provoked a little confusion.

I didn't find a way to subnet between two interfaces. MY thought was to set device's gateway to the next device.


R3 -
Server Fa0/0 - ;
Server Fa0/1 - ;

Triggered it : PT uses 1st port as the default port to forward traffic to the outside network. The 2nd port is only for forwarding traffic within the subnet. Configuring default gateway on 2nd port is insignificant.

How to subnet my network for what all traffic can pass and be filtered?

  • You need to change the addresses of the PCs or your router. Which is easier for you? The server will have only ONE default gateway address.
    – Ron Trunk
    Aug 23 '15 at 21:22
  • Both ways are easier. But I don't understand so well, Which Server's Interface should keep only one default gateway? inbound or outbound ?
    – TMoraes
    Aug 23 '15 at 21:29

Change the server Fa0 to The default gateway is

Fa1 has the original address No default gateway.

Change the router interface fa0/0 to

You will also need a static route on the router:

ip route
  • Ok, My Router: ; Server Fa0/0 - GT` ; How is the host configuration? Server Fa0/1 doesn't exists configuration?
    – TMoraes
    Aug 23 '15 at 21:55
  • Sorry, I was in a hurry. I corrected the answer
    – Ron Trunk
    Aug 23 '15 at 22:14
  • Done! The packet never arrive in Fa1, what Should I do? If I use another address trigger that message
    – TMoraes
    Aug 23 '15 at 23:58
  • Where is the packet from, and where is it going?
    – Ron Trunk
    Aug 24 '15 at 2:21
  • From PC7 to Router
    – TMoraes
    Aug 24 '15 at 14:06

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