Networking, 2 different subnets

Posted on 2012-08-10
Last Modified: 2012-08-10
If I understand this correctly, if I have 2 different nodes on 2 separate subnets, they can not connect to each other though the router unless you do port forwarding

Why is that.  

Given the following

Node 1
        ---- Switch ------ Router
Node 2

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Wouldn't the following scenario take place

Node 1 sends to the switch, the switch sends the packet tto the router, the router then knows where the IP of node 2 is from previous routing requests, and directs the packets back to the switch, which sends them to node 2

What am I missing ?

Why would I need port forwarding
Question by:Los Angeles1
    LVL 33

    Assisted Solution

    You don't.  Port forwarding is used when you're trying to mask or manipulate the availability of a service or listener.  Port forwarding is usually used between the Internet and a private network.
    LVL 13

    Accepted Solution

    Review teh document below:

    It goes over what port forwarding is and the different types of port forwarding.

    Note:  Two types of port forwarding.  One is done by the switch and how the data is broken up/divided to the next hop.  

    Other is Port Forwarding for NAT or Access-Control.  Trafffic Accessing tcp port 8080 is forwarded to port 80.  

    I'm not sure which you're referring to.

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