ipmon syslog entries

[TDuncklee]

My messages syslog has been filling up with this type of message:

Jan 4 08:05:01 xeon ipmon[74]: 08:05:00.964353 fxp0 @0:72 b 204.16.209.30,49381 -> 12.26.129.157,1027 PR udp len 20 472 IN
Jan 4 08:05:01 xeon ipmon[74]: 08:05:00.964419 fxp0 @0:72 b 204.16.209.30,49381 -> 12.26.129.158,1026 PR udp len 20 472 IN
Jan 4 08:05:01 xeon ipmon[74]: 08:05:00.964460 fxp0 @0:72 b 204.16.209.30,49381 -> 12.26.129.158,1027 PR udp len 20 472 IN

Can anyone explain what it is and is it a problem?
FreeBSD 4.11 Plesk 7.5