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 (163.253.39.x/24) can spoof 1023 neighboring addresses (within your /22 prefix)
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
163.253.39.x/24
/31
237
yes
163.253.39.x/24
/30
237
yes
163.253.39.x/24
/29
237
yes
163.253.39.x/24
/28
237
yes
163.253.39.x/24
/27
237
yes
163.253.39.x/24
/26
237
yes
163.253.39.x/24
/25
237
yes
163.253.39.x/24
/24
237
yes
163.253.38.x/24
/23
237
yes
163.253.37.x/24
/22
237
yes
163.253.35.x/24
/21
UNROUTED
no
163.253.47.x/24
/20
UNROUTED
no
163.253.55.x/24
/19
UNROUTED
no
163.253.7.x/24
/18
UNROUTED
no
163.253.103.x/24
/17
UNROUTED
no
163.253.167.x/24
/16
UNROUTED
no
163.252.39.x/24
/15
10753
no
163.255.39.x/24
/14
4766
no
163.249.39.x/24
/13
5133
no
163.245.39.x/24
/12
17
no
163.237.39.x/24
/11
19255
no
163.221.39.x/24
/10
2500
no
163.189.39.x/24
/9
55542
no
163.125.39.x/24
/8
17623
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)
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
2001:48d0:101:501:ec4:7aff:fea8:71a8
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
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
2601:183:44xx::/40
/120
7922
yes
2601:183:44xx::/40
/112
7922
yes
2601:183:44xx::/40
/104
7922
yes
2601:183:44xx::/40
/96
7922
yes
2601:183:44xx::/40
/88
7922
yes
2601:183:44xx::/40
/80
7922
yes
2601:183:44xx::/40
/72
7922
yes
2601:183:44xx::/40
/64
7922
yes
2601:183:44xx::/40
/56
7922
no
2601:183:44xx::/40
/48
7922
no
2601:183:44xx::/40
/40
7922
no
2601:183:c4xx::/40
/32
7922
no
2601:103:44xx::/40
/24
7922
no
2601:8183:44xx::/40
/16
UNROUTED
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.
