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 (195.133.201.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
195.133.201.x/24
/31
48347
rewritten
195.133.201.x/24
/30
48347
rewritten
195.133.201.x/24
/29
48347
rewritten
195.133.201.x/24
/28
48347
rewritten
195.133.201.x/24
/27
48347
rewritten
195.133.201.x/24
/26
48347
rewritten
195.133.201.x/24
/25
48347
rewritten
195.133.201.x/24
/24
48347
rewritten
195.133.200.x/24
/23
29076
rewritten
195.133.203.x/24
/22
61317
rewritten
195.133.205.x/24
/21
42666
rewritten
195.133.193.x/24
/20
3356
rewritten
195.133.217.x/24
/19
29226
rewritten
195.133.233.x/24
/18
196695
rewritten
195.133.137.x/24
/17
18106
rewritten
195.133.73.x/24
/16
UNROUTED
rewritten
195.132.201.x/24
/15
15557
rewritten
195.135.201.x/24
/14
44936
rewritten
195.129.201.x/24
/13
702
rewritten
195.141.201.x/24
/12
6730
rewritten
195.149.201.x/24
/11
29407
rewritten
195.165.201.x/24
/10
1759
rewritten
195.197.201.x/24
/9
719
rewritten
195.5.201.x/24
/8
60032
rewritten
Meaning of status in Received column:
rewritten
The source address of the probe packets we received differs from the spoofed address. It appears that an intermediate device is rewriting your packet headers.
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.