Traffic from [127.0.0.1]

To anyone who can assist:

I have captured incoming traffic that looks like the following:

tcpdump: listening on fxp0
16:14:28.739422 127.0.0.1.80 > xxx.xx.xx.6.1463: R [tcp sum ok] 0:0(0)
ack 73334785 win 0 (ttl 125, id 23431, len 40)
16:14:33.619279 127.0.0.1.80 > xxx.xx.xx.2.1192: R [tcp sum ok] 0:0(0)
ack 864092161 win 0 (ttl 123, id 59192, len 40)
16:15:07.119504 127.0.0.1.80 > xxx.xx.xx.2.1952: R [tcp sum ok] 0:0(0)
ack 843317249 win 0 (ttl 123, id 61397, len 40)
16:15:58.308952 127.0.0.1.80 > xxx.xx.xx.6.1488: R [tcp sum ok] 0:0(0)
ack 1767636993 win 0 (ttl 123, id 64714, len 40)
16:16:15.059209 127.0.0.1.80 > xxx.xx.xx.6.1752: R [tcp sum ok] 0:0(0)
ack 683540481 win 0 (ttl 123, id 254, len 40)
16:16:17.161879 127.0.0.1.80 > xxx.xx.xx.6.1701: R [tcp sum ok] 0:0(0)
ack 250478593 win 0 (ttl 123, id 42020, len 40)

The dest port changes, but the source stays the same. This is the way
that my rule set begins:

#-------------------------------------------------
#This section prevents spoofing and smurf attacks.
#-------------------------------------------------
block in quick on fxp0 from 192.168.0.0/16 to any
block in quick on fxp0 from 172.16.0.0/12 to any
block in quick on fxp0 from 127.0.0.0/8 to any
block in quick on fxp0 from 10.0.0.0/8 to any
....

1. Does anyone know the source of this traffic?
2. I'm not getting any blocked packets in my log. Am I doing something
wrong?

Thanks,

Matthew Lee
Rycan Technologies, Inc.
http://www.rycan.com
mattl@rycan.com