Why I see a lot of this?

Anyone can explain why I see hundreds of this? from a different IP addrs (diffrent SRC) and what is this mean? Is there any plauge war? or losse virus?? Aug 12 23:42:24 Deneb kernel: SuSE-FW-DROP-DEFAULT IN=ppp0 OUT= MAC= SRC=112.127.29.18 DST=203.77.234.102 LEN=32 TOS=0x00 PREC=0x00 TTL=112 ID=1531 PROTO=UDP SPT=3646 DPT=28800 LEN=12 Aug 12 23:42:24 Deneb kernel: SuSE-FW-DROP-DEFAULT IN=ppp0 OUT= MAC= SRC=213.170.112.15 DST=203.77.234.102 LEN=32 TOS=0x00 PREC=0x00 TTL=107 ID=16427 PROTO=UDP SPT=28800 DPT=28800 LEN=12