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 was unable to source even non-spoofed IPv6 UDP traffic to our servers. A firewall, router or other middlebox is preventing our testing. To test your provider's network further, you must remove the firewall or 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 (199.187.221.x/24) can spoof 1 neighboring addresses (within your /31 prefix)
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
199.187.221.x/24
/31
19230
yes
199.187.221.x/24
/30
19230
sendto
199.187.221.x/24
/29
19230
sendto
199.187.221.x/24
/28
19230
sendto
199.187.221.x/24
/27
19230
sendto
199.187.221.x/24
/26
19230
sendto
199.187.221.x/24
/25
19230
sendto
199.187.221.x/24
/24
19230
sendto
199.187.220.x/24
/23
19230
sendto
199.187.223.x/24
/22
19230
sendto
199.187.217.x/24
/21
19230
sendto
199.187.213.x/24
/20
11492
sendto
199.187.205.x/24
/19
19331
sendto
199.187.253.x/24
/18
19201
sendto
199.187.157.x/24
/17
UNROUTED
sendto
199.187.93.x/24
/16
UNROUTED
sendto
199.186.221.x/24
/15
7018
sendto
199.185.221.x/24
/14
852
sendto
199.191.221.x/24
/13
UNROUTED
sendto
199.179.221.x/24
/12
UNROUTED
sendto
199.171.221.x/24
/11
701
sendto
199.155.221.x/24
/10
4152
sendto
199.251.221.x/24
/9
721
sendto
199.59.221.x/24
/8
UNROUTED
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 10 IP hop(s).
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
2600:6ce7:xx::/40
/120
16787
no
2600:6ce7:xx::/40
/112
16787
no
2600:6ce7:xx::/40
/104
16787
no
2600:6ce7:xx::/40
/96
16787
no
2600:6ce7:xx::/40
/88
16787
no
2600:6ce7:xx::/40
/80
16787
no
2600:6ce7:xx::/40
/72
16787
no
2600:6ce7:xx::/40
/64
16787
no
2600:6ce7:xx::/40
/56
16787
no
2600:6ce7:xx::/40
/48
16787
no
2600:6ce7:xx::/40
/40
16787
no
2600:6ce7:80xx::/40
/32
16787
no
2600:6c67:xx::/40
/24
33588
no
2600:ece7:xx::/40
/16
UNROUTED
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.
