How to connect from localhost->router->Internet->router->localhost Port 3456?

Assume I have an successful working in-house LAN with a router which works as well as gateway to the internet.

Now I want to test how a client on my local computer works with a server on my local computer.

When I connect both directly on my machine then everything works fine.

However I want to find out if they cooperate as well if they are connected through the Internet.
In such a case possible difficulties regarding Firewall, NAT port forwarding, DNS lookup
and others would be detected.

How can a simulate such an routing over the Internet? How can I force my local computer
not to take the easy, direct way but to redirect all TCP/IP packets through the internet?

Using a Proy somewhere in the world would not work because proxies do only work for port 80
and http protocol.

How can I achieve a similar routing for lets say communication over port 3456?

Ken

[Grincheux]

I exactly have the same problem.
I want to write a forum and server and client can be everywhere in the world.
You PC can be a client for mine and my PC can be a client for your PC, that means there is a server onto yor PC.

I looked for many times, but did not get any informations.
What to use ? WinSock, MSMQ, MAPI ?

If you have an answer, please give me some pieces... I am lost.

Thanks
Grincheux

[Expertz]

Originally Posted by Grincheux

I exactly have the same problem.
I want to write a forum and server and client can be everywhere in the world.
You PC can be a client for mine and my PC can be a client for your PC, that means there is a server onto yor PC.

I looked for many times, but did not get any informations.
What to use ? WinSock, MSMQ, MAPI ?

If you have an answer, please give me some pieces... I am lost.

Thanks
Grincheux

You can install a server on a computer., if you are using Windows 2003, install IIS, if on Linux, install Apache. Both are web servers. Then you hit the web server with your web browser. You would also need to run "dcpromo.exe" and set up active directory, with a domain. Don't forget about DNS and DHCP. This way you can set up client-server.

[Grincheux]

Thanks for the answer, but this is not what I need.

I am using assembly language and thought there was a solution using sockets.

On my local network, there is no problem but when connecting outside my house it fails !

[Expertz]

Originally Posted by Grincheux

Thanks for the answer, but this is not what I need.

I am using assembly language and thought there was a solution using sockets.

On my local network, there is no problem but when connecting outside my house it fails !

Are the users you want to connect to all, using the same ISP ?
Are their laptop/computer setup with DHCP (from the ISP) or fixed IP ?
What is the DNS used in the laptops/computer ?
Is this machine getting it's IP via DHCP or static? Double check your DNS servernames and verify you have a default route/gateway.