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 (137.164.83.x/24) can spoof 2047 neighboring addresses (within your /21 prefix)
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
137.164.83.x/24
/31
2152
yes
137.164.83.x/24
/30
2152
yes
137.164.83.x/24
/29
2152
yes
137.164.83.x/24
/28
2152
yes
137.164.83.x/24
/27
2152
yes
137.164.83.x/24
/26
2152
yes
137.164.83.x/24
/25
2152
yes
137.164.83.x/24
/24
2152
yes
137.164.82.x/24
/23
2152
yes
137.164.81.x/24
/22
2152
yes
137.164.87.x/24
/21
2152
yes
137.164.91.x/24
/20
2152
no
137.164.67.x/24
/19
2152
no
137.164.115.x/24
/18
2152
no
137.164.19.x/24
/17
2152
no
137.164.211.x/24
/16
2152
no
137.165.83.x/24
/15
11399
no
137.166.83.x/24
/14
58877
no
137.160.83.x/24
/13
3549
no
137.172.83.x/24
/12
UNROUTED
no
137.180.83.x/24
/11
11003
no
137.132.83.x/24
/10
7472
no
137.228.83.x/24
/9
127
no
137.36.83.x/24
/8
11351
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
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: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
2607:f380:axx::/40
/120
2152
yes
2607:f380:axx::/40
/112
2152
yes
2607:f380:axx::/40
/104
2152
yes
2607:f380:axx::/40
/96
2152
yes
2607:f380:axx::/40
/88
2152
yes
2607:f380:axx::/40
/80
2152
yes
2607:f380:axx::/40
/72
2152
yes
2607:f380:axx::/40
/64
2152
yes
2607:f380:axx::/40
/56
2152
yes
2607:f380:axx::/40
/48
2152
yes
2607:f380:axx::/40
/40
2152
no
2607:f380:8axx::/40
/32
2152
no
2607:f300:axx::/40
/24
UNROUTED
no
2607:7380:axx::/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.
