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 (91.239.192.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
91.239.192.x/24
/31
198154
no
91.239.192.x/24
/30
198154
no
91.239.192.x/24
/29
198154
no
91.239.192.x/24
/28
198154
no
91.239.192.x/24
/27
198154
no
91.239.192.x/24
/26
198154
no
91.239.192.x/24
/25
198154
no
91.239.192.x/24
/24
198154
no
91.239.193.x/24
/23
198827
no
91.239.194.x/24
/22
58204
no
91.239.196.x/24
/21
198317
no
91.239.200.x/24
/20
60606
no
91.239.208.x/24
/19
199912
no
91.239.224.x/24
/18
209767
no
91.239.128.x/24
/17
58170
no
91.239.64.x/24
/16
204646
no
91.238.192.x/24
/15
48628
no
91.237.192.x/24
/14
43559
no
91.235.192.x/24
/13
198498
no
91.231.192.x/24
/12
198114
no
91.255.192.x/24
/11
1267
no
91.207.192.x/24
/10
15992
no
91.175.192.x/24
/9
12322
no
91.111.192.x/24
/8
2856
no
Meaning of status in Received column:
no
Packets spoofed from adjacent netblock were not received, probably due to blocking
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.
