ipfw pipe showing weird ip

[Karan Gupta]

    00001:   1.024 Mbit/s    0 ms   50 sl. 20 queues (256 buckets) droptail
    mask: 0x00 0xffffffff/0x0000 -> 0x00000000/0x0000
BKT Prot ___Source IP/port____ ____Dest. IP/port____ Tot_pkt/bytes Pkt/Byte Drp
  0 ip           0.0.0.0/0             0.0.0.0/0       68    22681  0    0   0
 10 ip        10.0.148.5/0             0.0.0.0/0       12     1152  0    0   0
 14 ip        10.0.148.7/0             0.0.0.0/0      115     8740  0    0   0
 20 ip          0.0.0.10/0             0.0.0.0/0     2858166 114326640  0    0   0


Heres the output of  the ipfw pipe sh command
My concern is the Source IP entry of 0.0.0.10/0...what could that be?



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