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 (176.123.0.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
176.123.0.x/24
/31
200019
natblock
176.123.0.x/24
/30
200019
natblock
176.123.0.x/24
/29
200019
natblock
176.123.0.x/24
/28
200019
natblock
176.123.0.x/24
/27
200019
natblock
176.123.0.x/24
/26
200019
natblock
176.123.0.x/24
/25
200019
natblock
176.123.0.x/24
/24
200019
natblock
176.123.1.x/24
/23
200019
natblock
176.123.2.x/24
/22
200019
natblock
176.123.4.x/24
/21
200019
natblock
176.123.8.x/24
/20
200019
natblock
176.123.16.x/24
/19
30873
natblock
176.123.32.x/24
/18
61124
natblock
176.123.64.x/24
/17
59506
natblock
176.123.128.x/24
/16
45054
natblock
176.122.0.x/24
/15
49588
natblock
176.121.0.x/24
/14
207931
natblock
176.127.0.x/24
/13
3303
natblock
176.115.0.x/24
/12
58350
natblock
176.107.0.x/24
/11
48320
natblock
176.91.0.x/24
/10
16135
natblock
176.59.0.x/24
/9
15378
natblock
176.251.0.x/24
/8
5607
natblock
Meaning of status in Received column:
natblock
Spoofed probe packets appear to be blocked by your local NAT or firewall rather than being rewritten with a public source address.
IPv4 Outbound Filtering Depth:
The tracefilter test found your host
unable to spoof routable, non-adjacent source addresses through
even the first IP hop.
IPv6 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.
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
2001:678:6xx::/40
/120
200019
sendto
2001:678:6xx::/40
/112
200019
sendto
2001:678:6xx::/40
/104
200019
sendto
2001:678:6xx::/40
/96
200019
sendto
2001:678:6xx::/40
/88
200019
sendto
2001:678:6xx::/40
/80
200019
sendto
2001:678:6xx::/40
/72
200019
sendto
2001:678:6xx::/40
/64
200019
sendto
2001:678:6xx::/40
/56
200019
sendto
2001:678:6xx::/40
/48
200019
sendto
2001:678:6xx::/40
/40
UNROUTED
sendto
2001:678:86xx::/40
/32
UNROUTED
sendto
2001:6f8:6xx::/40
/24
3257
sendto
2001:8678:6xx::/40
/16
1221
sendto
Meaning of status in Received column:
sendto
The spoofer client was unable to send spoofed headers due to an operating system restriction.
Summary:
The results from all tests are aggregated to produce a summary
"State of IP Spoofing" report.
