Ipchains log messages

Hi! my ipchains is producing the following output in the logfiles: Mar 13 15:35:32 clint kernel: Packet log: input DENY eth0 PROTO=1 aaa.aaa.aaa.aaa:8 bbb.bbb.bbb.bbb:0 L=84 S=0x00 I=11654 F=0x0000 T=57 (#792) I wonder why I get this messages because the IP-Adress bbb.bbb.bbb.bbb is none of mine! (but its in the same subnet) Its very annoying because Host aaa.aaa.aaa.aaa is sending ICMPs to bbb.bbb.bbb.bbb for several hours now, and my logfile is growing quite big... bye Christian