🚀 go-pugleaf

 I actually want to know this :
      A client(C) in LAN behind the Firewall/route(F) want to
 connect to a Server(S) in WAN.Suppose that we use the UDP.
      Now,Client connects to Server directly use S's IP,and
 Send a Message To Server,
The Server receive the Client's Message,then Send the response Message to Client,Now,
I confused,The Server must connect to Client use Firewall's IP,But use Which Port? 
If they connect next time,does the Port change?



Hans Galema <dontusethis@dontusethis.nl> wrote:
>minoy wrote:
>
>> I has searched for this subject:
>(I have searched for this subject and found:)
>
>
>> a client behind the firewall connects to a outside server
>> I kown this,but then how the outside server connect to a client?
>> 
>> Is it this?
>>     when a client(A) behind the firewall(F) connects to a
 out server(S),the the F give the A a temporary address
IP:PPort),the outside server then use this temporary address 
given by firewall to respond the connection.
>
>No. What you just tried to describe is how a client would connect
>with a server residing outside.
>
>Why are you asking for a server connecting with a client ?
>Servers do not connect to clients I would think.
>
>Hans.