Try tracking this you Jive Ass Honky Mofos..... (Score -1)

~ # grep -i scrub /etc/pf.conf
scrub on $Ext reassemble tcp random-id

Which http://lcamtuf.coredump.cx/p0f-help/ says is

Your system is recognized as: XX.X.XXX.XXX:53420 - UNKNOWN [65228:53:1:64:M1438,N,N,S,N,W0,N,N,T:.:?:?] (up: 6873 hrs) -> 213.134.128.25:80 (link: unknown-1478) P0f did not recognize your system. We would really appreciate if you could tell us more about the system using the form below. Thanks!