Cheat Engine

oib111 · Posted: Sat Jan 17, 2009 12:37 pm Post subject: Direct Connections

I was wondering how a "Direct Connection" is possible. Like the option in AIM for a direct connection so you can show photos and such. How can a direct connection between two clients be possible without port forwarding? Also, how can you transfer the images with packets?

b6ooy · Posted: Sat Jan 17, 2009 12:43 pm Post subject:

I want to ask the same question too ..
I've made few programs in C++ using sockets , but the program doesn't connect online ( only throught a private network ) and I cannot do portforward ( I get empty page when typing the modem ip etc.. )

killersamurai · Posted: Sat Jan 17, 2009 1:11 pm Post subject:

P2P I believe. Here is a link to the grouping api used for the P2P infrastructure
http://msdn.microsoft.com/en-us/library/aa371031.aspx

oib111 · Posted: Sat Jan 17, 2009 3:19 pm Post subject:

Thanks killer I'll take a look at it.

EDIT:

Is this suppose to work on a WAN?

tombana · Posted: Sun Jan 18, 2009 5:36 am Post subject:

A lot of those major programs use a form of NAT Traversal, like STUN or UDP hole punching.
In short it works like this:
client A and B want to connect directly to each other, but don't have ports forwarded. They both connect to a server (which does have ports forwarded). This will automatically open up an outbound port in the router, and the server will for example send the port number of client A to client B. Then the server will disconnect and client B will quickly try to connect to client A while the port is still open.

oib111 · Posted: Sun Jan 18, 2009 3:08 pm Post subject: