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 (154.73.26.x/24) can spoof 7 neighboring addresses (within your /29 prefix)
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
154.73.26.x/24
/31
327764
yes
154.73.26.x/24
/30
327764
yes
154.73.26.x/24
/29
327764
yes
154.73.26.x/24
/28
327764
no
154.73.26.x/24
/27
327764
no
154.73.26.x/24
/26
327764
no
154.73.26.x/24
/25
327764
no
154.73.26.x/24
/24
327764
no
154.73.27.x/24
/23
327764
no
154.73.24.x/24
/22
327764
no
154.73.30.x/24
/21
29286
no
154.73.18.x/24
/20
327737
no
154.73.10.x/24
/19
37682
no
154.73.58.x/24
/18
37512
no
154.73.90.x/24
/17
37406
no
154.73.154.x/24
/16
37675
no
154.72.26.x/24
/15
UNROUTED
no
154.75.26.x/24
/14
37035
no
154.77.26.x/24
/13
36926
no
154.65.26.x/24
/12
328279
no
154.89.26.x/24
/11
35916
no
154.105.26.x/24
/10
37693
no
154.9.26.x/24
/9
174
no
154.201.26.x/24
/8
135357
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.
