Is this possible with QT or CPP: Routing Encapsulation / IP Encapsulation?

[janton]

Sorry perhaps my question wasn't that clear, so I took my pen and draw it (there is nothing better then a clear picture)
I get back on your questions soon, the problem is... perhaps i did not explain as well as i hoped. See image below:

The circle starts with the user that sends a request to the server etc.
is_this_possible.jpg

I don't want to make changes to the kernel, i want to write a linux program that redirects a users request to a external server that then send the responds back to the user.

[wysota]

So what you want to do is a sort of network proxy. Yes, it is possible to do it with Qt with the only exception that the new request will not carry the user IP. And I don't think any networking stack will allow a user application to forge a packet with a fake IP address. Which sums up to the fact, that the reply will go back to the proxy and then can be forwarded back to the client.

However the question that comes to my mind is why you want to do it using Qt, I don't see any benefits of that.