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.
Warnings:
⚠️ Your host is behind a Network Address Translation (NAT) router or firewall which rewrites the source addresses of the test traffic. To test your provider's network further, you must remove the NAT/firewall/router and connect directly.
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 (200.4.118.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
200.4.118.x/24
/31
263569
rewritten
200.4.118.x/24
/30
263569
rewritten
200.4.118.x/24
/29
263569
rewritten
200.4.118.x/24
/28
263569
rewritten
200.4.118.x/24
/27
263569
rewritten
200.4.118.x/24
/26
263569
rewritten
200.4.118.x/24
/25
263569
rewritten
200.4.118.x/24
/24
263569
rewritten
200.4.119.x/24
/23
263569
rewritten
200.4.116.x/24
/22
263569
rewritten
200.4.114.x/24
/21
271332
rewritten
200.4.126.x/24
/20
271413
rewritten
200.4.102.x/24
/19
271371
rewritten
200.4.86.x/24
/18
18532
rewritten
200.4.54.x/24
/17
UNROUTED
rewritten
200.4.246.x/24
/16
6147
rewritten
200.5.118.x/24
/15
10834
rewritten
200.6.118.x/24
/14
27659
rewritten
200.0.118.x/24
/13
12252
rewritten
200.12.118.x/24
/12
28524
rewritten
200.20.118.x/24
/11
2715
rewritten
200.36.118.x/24
/10
UNROUTED
rewritten
200.68.118.x/24
/9
16814
rewritten
200.132.118.x/24
/8
2716
rewritten
Meaning of status in Received column:
rewritten
The source address of the probe packets we received differs from the spoofed address. It appears that an intermediate device is rewriting your packet headers.
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
2804:f30:40xx::/40
/120
263569
no
2804:f30:40xx::/40
/112
263569
no
2804:f30:40xx::/40
/104
263569
no
2804:f30:40xx::/40
/96
263569
no
2804:f30:40xx::/40
/88
263569
no
2804:f30:40xx::/40
/80
263569
no
2804:f30:40xx::/40
/72
263569
no
2804:f30:40xx::/40
/64
263569
no
2804:f30:40xx::/40
/56
263569
no
2804:f30:40xx::/40
/48
263569
no
2804:f30:40xx::/40
/40
263569
no
2804:f30:c0xx::/40
/32
263569
no
2804:fb0:40xx::/40
/24
262841
no
2804:8f30:40xx::/40
/16
273474
no
Meaning of status in Received column:
no
Packets spoofed from adjacent netblock were not received, probably due to blocking
Summary:
The results from all tests are aggregated to produce a summary
"State of IP Spoofing" report.
