tcp dest port 5773 attack?

["Erick B." <erickbe () yahoo com>]

Hi,

Had a client today have a inside user apparently doing
DoS attack to a 24.x.x.x address (probably some cable
broadband user) and all the traffic was from multiple
src IPs (maybe spoofed) to dest tcp port 5773. I
didn't see a copy of the trace but I had them plug a
null/blackhole host route in router to stop it then
they tracked down the PC, etc. 

Anyway, was googling all over and checking other
resources and couldn't lay my fingers on anything that
uses tcp port 5773. Any one run across this before? 

Thanks, Erick


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