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 (191.37.140.x/24) can spoof 15 neighboring addresses (within your /28 prefix)
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
191.37.140.x/24
/31
263367
yes
191.37.140.x/24
/30
263367
no
191.37.140.x/24
/29
263367
no
191.37.140.x/24
/28
263367
yes
191.37.140.x/24
/27
263367
no
191.37.140.x/24
/26
263367
no
191.37.140.x/24
/25
263367
no
191.37.140.x/24
/24
263367
no
191.37.141.x/24
/23
263367
no
191.37.142.x/24
/22
263367
no
191.37.136.x/24
/21
263360
no
191.37.132.x/24
/20
263359
no
191.37.156.x/24
/19
263362
no
191.37.172.x/24
/18
263368
no
191.37.204.x/24
/17
263371
no
191.37.12.x/24
/16
263350
no
191.36.140.x/24
/15
263335
no
191.39.140.x/24
/14
53037
no
191.33.140.x/24
/13
18881
no
191.45.140.x/24
/12
7738
no
191.53.140.x/24
/11
28202
no
191.5.140.x/24
/10
263536
no
191.101.140.x/24
/9
61317
no
191.165.140.x/24
/8
26615
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.
Summary:
The results from all tests are aggregated to produce a summary
"State of IP Spoofing" report.
