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 (131.255.117.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
131.255.117.x/24
/31
264478
natblock
131.255.117.x/24
/30
264478
natblock
131.255.117.x/24
/29
264478
natblock
131.255.117.x/24
/28
264478
natblock
131.255.117.x/24
/27
264478
natblock
131.255.117.x/24
/26
264478
natblock
131.255.117.x/24
/25
264478
natblock
131.255.117.x/24
/24
264478
natblock
131.255.116.x/24
/23
264478
natblock
131.255.119.x/24
/22
264478
natblock
131.255.113.x/24
/21
264487
natblock
131.255.125.x/24
/20
264480
natblock
131.255.101.x/24
/19
28165
natblock
131.255.85.x/24
/18
264471
natblock
131.255.53.x/24
/17
262675
natblock
131.255.245.x/24
/16
262962
natblock
131.254.117.x/24
/15
1938
natblock
131.253.117.x/24
/14
8070
natblock
131.251.117.x/24
/13
786
natblock
131.247.117.x/24
/12
5661
natblock
131.239.117.x/24
/11
14985
natblock
131.223.117.x/24
/10
UNROUTED
natblock
131.191.117.x/24
/9
14677
natblock
131.127.117.x/24
/8
UNROUTED
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 probes:
Spoofed source address
Destination
Received
2001:4978:1fb:6400::d2
2001:48d0:101:501::242
yes
2001:49aa:111:aa00::11
2001:48d0:101:501::242
yes
fd11:1111:1111::1111
2001:48d0:101:501::242
yes
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
2804:2038:80xx::/40
/120
264478
yes
2804:2038:80xx::/40
/112
264478
yes
2804:2038:80xx::/40
/104
264478
yes
2804:2038:80xx::/40
/96
264478
yes
2804:2038:80xx::/40
/88
264478
yes
2804:2038:80xx::/40
/80
264478
yes
2804:2038:80xx::/40
/72
264478
yes
2804:2038:80xx::/40
/64
264478
yes
2804:2038:80xx::/40
/56
264478
yes
2804:2038:80xx::/40
/48
264478
yes
2804:2038:80xx::/40
/40
264478
yes
2804:2038:xx::/40
/32
264478
yes
2804:20b8:80xx::/40
/24
UNROUTED
yes
2804:a038:80xx::/40
/16
UNROUTED
yes
Meaning of status in Received column:
yes
Packets spoofed from adjacent netblock were received (but that netblock is within the source AS)
Summary:
The results from all tests are aggregated to produce a summary
"State of IP Spoofing" report.