[Alug] Dozens (Hundreds?) of entries in my logs

Jan 18 22:02:00 XXXXXXXX kernel: Packet log: input DENY ppp0 PROTO=17 213.122.164.171:1038 255.255.255.255:2710 L=51 S=0x00 I=9892 F=0x0000 T=64 (#33) Can anyone tell me what these are? I'm suddenly (last few days) getting an awful lot of these firewall messages. They are emanating from my ISP (BtInternet). Barry Samuels