Pattern of tests from this IP block indicates a switch from allowing spoofing to blocking it.
rewritten
Spoofed packet was received, but the source address was changed en route.
blocked
Spoofed packet was not received, but unspoofed packet was.
unknown
Neither spoofed nor unspoofed packet was received.
IPv4 AS Route:
This test run probed the following paths in order to infer your
ability to send different spoofed source packets. Each node
in the graph corresponds to an autonomous system, i.e.
different Internet service providers. NOTE: This graph does NOT show if
an AS blocks spoofed packets, only the path taken by received spoofed
packets. The IP Path Details
are available for this run. If non-spoofed packets weren't received at
a destination, the traceroute to that destination is not included in this
graph and may even cause a totally empty graph.
IPv4 Adjacent Netblock Testing:
Your host (80.247.18.x/24) can spoof 3 neighboring addresses (within your /30 prefix)
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
80.247.18.x/24
/31
39875
sendto
80.247.18.x/24
/30
39875
yes
80.247.18.x/24
/29
39875
sendto
80.247.18.x/24
/28
39875
sendto
80.247.18.x/24
/27
39875
sendto
80.247.18.x/24
/26
39875
sendto
80.247.18.x/24
/25
39875
sendto
80.247.18.x/24
/24
39875
sendto
80.247.19.x/24
/23
39875
sendto
80.247.16.x/24
/22
39875
sendto
80.247.22.x/24
/21
39875
sendto
80.247.26.x/24
/20
39875
sendto
80.247.2.x/24
/19
50624
sendto
80.247.50.x/24
/18
202161
sendto
80.247.82.x/24
/17
200751
sendto
80.247.146.x/24
/16
12684
sendto
80.246.18.x/24
/15
34434
sendto
80.245.18.x/24
/14
34177
sendto
80.243.18.x/24
/13
21412
sendto
80.255.18.x/24
/12
25513
sendto
80.231.18.x/24
/11
6453
sendto
80.215.18.x/24
/10
5410
sendto
80.183.18.x/24
/9
3269
sendto
80.119.18.x/24
/8
15557
sendto
Meaning of status in Received column:
yes
Packets spoofed from adjacent netblock were received (but that netblock is within the source AS)
sendto
The spoofer client was unable to send spoofed headers due to an operating system restriction.
IPv4 Outbound Filtering Depth:
The tracefilter test found your host
able to spoof routable, non-adjacent source addresses through the
first 1 IP hop(s).
Summary:
The results from all tests are aggregated to produce a summary
"State of IP Spoofing" report.
