I guess this is one of the most changed headers I remember... Phex checks all these header to find the listening port:
X-Node, X-Listen-IP, Listen-IP, X-My-Address

Over the years every one or the other client used one of the headers, and they were changed multiple times forth and back. To my knowledge the last officially specified header to use is X-Node. But I could be wrong.

Apparently Limewire again changed the header and kept it as always as there personal secret. I assume the new header Limewire is using is X-FW-Node-Info, the new format is of course not specified anywhere else then in the source....
I guess the header change was done to support push proxy, which would help to make browse more reliable. But it won't help if only Limewire knows how it works...

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