I'd like to post a part of my m0n0wall firewall log hoping someone can 
help me finding the reason why I have my log full of the same data and I 
don't know why.
I searched google to find something about 1574 udp port but found 
nothing except the fact it's mn-mlevel port.
What does it mean? What is the mn-mlevel port? I guess it can be 
concerned with my p2p programm because the source port is, most often 
than not, the same: 4672.
Those data is blocked by the firewall but I'd really like to know what 
kind of data that is.

The strange fact, I think, is that I natted the udp port I use (36838) 
for my emule and all the data that pass through that cause no problem.

I hope someone can help me.

! 87.17.69.98 is my WAN IP address.

Thanks a lot, Michele.

TIME                       NET      SOURCE                              
DESTINATION                PROTO  
14:24:31.747206     WAN     124.96.217.102, port 4672    87.17.69.98, 
port 1574     UDP
14:24:30.435800     WAN     87.2.147.203, port 4672        87.17.69.98, 
port 1574     UDP
14:24:29.313848     WAN     89.132.108.51, port 42689    87.17.69.98, 
port 1574     UDP
14:24:27.326122     WAN     203.73.245.254, port 4672    87.17.69.98, 
port 1574     UDP
14:24:25.720956     WAN     88.152.199.35, port 4672      87.17.69.98, 
port 1574     UDP
14:24:16.950444     WAN     87.6.101.170, port 4672        87.17.69.98, 
port 1574     UDP
14:24:14.178438     WAN     83.179.212.75, port 9508      87.17.69.98, 
port 1574     UDP
14:24:13.767544     WAN     151.49.203.183, port 17501   87.17.69.98, 
port 1574     UDP
14:24:12.765480     WAN     89.83.4.130, port 4672          87.17.69.98, 
port 1574     UDP
14:24:08.595806     WAN     88.17.119.15, port 4672        87.17.69.98, 
port 1574     UDP