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 (116.251.187.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
116.251.187.x/24
/31
55850
natblock
116.251.187.x/24
/30
55850
natblock
116.251.187.x/24
/29
55850
natblock
116.251.187.x/24
/28
55850
natblock
116.251.187.x/24
/27
55850
natblock
116.251.187.x/24
/26
55850
natblock
116.251.187.x/24
/25
55850
natblock
116.251.187.x/24
/24
55850
natblock
116.251.186.x/24
/23
55850
natblock
116.251.185.x/24
/22
55850
natblock
116.251.191.x/24
/21
55850
natblock
116.251.179.x/24
/20
55850
natblock
116.251.171.x/24
/19
55850
natblock
116.251.155.x/24
/18
55850
natblock
116.251.251.x/24
/17
133771
natblock
116.251.59.x/24
/16
24033
natblock
116.250.187.x/24
/15
24033
natblock
116.249.187.x/24
/14
4134
natblock
116.255.187.x/24
/13
37943
natblock
116.243.187.x/24
/12
4847
natblock
116.235.187.x/24
/11
4812
natblock
116.219.187.x/24
/10
UNROUTED
natblock
116.187.187.x/24
/9
UNROUTED
natblock
116.123.187.x/24
/8
9318
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
able to spoof routable, non-adjacent source addresses through the
first 1 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 probes:
Spoofed source address
Destination
Received
2001:48d0:101:501::159
2001:410:102:1::78
no
2001:4978:1fb:6400::d2
2001:410:102:1::78
no
2001:49aa:111:aa00::11
2001:410:102:1::78
no
fd11:1111:1111::1111
2001:410:102:1::78
no
2001:48d0:101:501::159
2001:48d0:101:501::242
no
2001:4978:1fb:6400::d2
2001:48d0:101:501::242
no
2001:49aa:111:aa00::11
2001:48d0:101:501::242
no
fd11:1111:1111::1111
2001:48d0:101:501::242
no
2001:48d0:101:501::159
2001:48d0:101:501::247
no
2001:4978:1fb:6400::d2
2001:48d0:101:501::247
no
2001:49aa:111:aa00::11
2001:48d0:101:501::247
no
fd11:1111:1111::1111
2001:48d0:101:501::247
no
2001:48d0:101:501::159
2607:f278:2:13:ba27:ebff:fe3f:b21e
no
2001:4978:1fb:6400::d2
2607:f278:2:13:ba27:ebff:fe3f:b21e
no
2001:49aa:111:aa00::11
2607:f278:2:13:ba27:ebff:fe3f:b21e
no
fd11:1111:1111::1111
2607:f278:2:13:ba27:ebff:fe3f:b21e
no
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
2406:5a00:e0xx::/40
/120
55850
yes
2406:5a00:e0xx::/40
/112
55850
yes
2406:5a00:e0xx::/40
/104
55850
yes
2406:5a00:e0xx::/40
/96
55850
yes
2406:5a00:e0xx::/40
/88
55850
yes
2406:5a00:e0xx::/40
/80
55850
yes
2406:5a00:e0xx::/40
/72
55850
yes
2406:5a00:e0xx::/40
/64
55850
yes
2406:5a00:e0xx::/40
/56
55850
yes
2406:5a00:e0xx::/40
/48
55850
no
2406:5a00:e0xx::/40
/40
55850
no
2406:5a00:60xx::/40
/32
55850
no
2406:5a80:e0xx::/40
/24
UNROUTED
no
2406:da00:e0xx::/40
/16
16509
no
Meaning of status in Received column:
no
Packets spoofed from adjacent netblock were not received, probably due to blocking
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.
