logsentry

I searched in the archives but could not find anything about it.
What does these lines mean in the logs logsentry sends me every morning ?

(#23) Apr 21 03:53:26 www kernel: Packet log: input DENY eth0 PROTO=17
216.234.186.34:138 216.234.186.255:138 L=232 S=0x00 I=37198 F=0x0000 T=64
(#23) Apr 21 03:53:26 www kernel: Packet log: input DENY eth0 PROTO=17
172.16.70.1:138 172.16.70.255:138 L=239 S=0x00 I=37199 F=0x0000 T=64 (#23)
Apr 21 03:53:26 www kernel: Packet log: input DENY eth0 PROTO=17
There a whole bunch of them, is it anything to worry about ?

 

 

 

 

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