Can Upnp be used for Java Port forwarding with PGM/EPGM instead of relying on TCP or UDP?

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Yes, UPnP can be used for Java port forwarding with PGM/EPGM, but the exact implementation would depend on the library or framework being used. UPnP supports various protocols, including TCP and UDP, but it also supports multicast protocols like PGM/EPGM. To use UPnP for PGM/EPGM port forwarding in Java, you would need to find a library or framework that provides UPnP functionality and supports these multicast protocols. Some popular options include the Cling library and the jUPnP framework.