CODEWITHSUNDEEP
javaserverportportforwarding
sazzy4o
sazzy4o

Reputation: 3343

How to port forward automatically in java?

I know that bit torrent clients use automatic port forwarding (Port forwarding with having to configure the router) so that they can connect to each other. I want the users in my application to be able to host a server without having to configure the router. So I was wondering how you would do so in java?

Upvotes: 3

Views: 5422

Answers (3)

Kotauskas
Kotauskas

Reputation: 1374

You can use UPnP (Universal Plug and Play) port forwarding. One library mentioned is Cling, but there's much simpler library - WaifUPnP, which allows you to forward a port with just one line like:

UPnP.openTCP(portnumber);

Upvotes: 4

Peter Peng
Peter Peng

Reputation: 1958

UPnP protocol can handle the automatic port forwarding. Try this library (Cling - Java/Android UPnP library and tools): http://4thline.org/projects/cling/

Upvotes: 1

Tripp Kinetics
Tripp Kinetics

Reputation: 5439

UPnP is your friend. It is a standardized method which allows automatically configuring routers to forward ports. There are a couple of different ways to do it. One package that supports UPnP under Java is Cling. http://4thline.org/projects/cling/

Upvotes: 1

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