I used wireshark on my local network (to test it), and i noticed that there is a lot of udp packets send one broadcast, and the majority is coming from only one host. Theses udp packets are send on broadcast on the port 25860.
Seing all theses packets sent to the same port, and always have the same data, i thought that it might be a known packet (such as DNS request may be or something like that). So, can someone tell me what is the purpose of theses packets (if they have one) ?