Ämne:Re: [dcdev] ADC already obsolete?
Till:Direct Connect developers
On Friday 11 February 2005 14:27, Gustaf Räntilä wrote:<... Snip UDP port-punching scheme ...>
Yes, this sounds logical, but many NAT routers will rewrite the source port, and the scheme you outlined relies on the fact that the parts are sending to the correct ports which will be opened for a brief window of time (45 seconds is default in Linux at least). In the cases where the source port have been changed by the router, the clients have no way of knowing which port to send to, thus communication cannot be established.
I suspect this happens more frequently on routers when there is high amounts of traffic going on.
CTM have a command parameter for this exact reason. The thing we need is
a standardized CTCP for control channel via hub, and an additional protocol for such udp traffic. That can be done by merely adding a few commands to the
hub, so the hub doesn't need to be updated much at all.