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 (185.31.158.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
185.31.158.x/24
/31
9186
natblock
185.31.158.x/24
/30
9186
natblock
185.31.158.x/24
/29
9186
natblock
185.31.158.x/24
/28
9186
natblock
185.31.158.x/24
/27
9186
natblock
185.31.158.x/24
/26
9186
natblock
185.31.158.x/24
/25
9186
natblock
185.31.158.x/24
/24
9186
natblock
185.31.159.x/24
/23
9186
natblock
185.31.156.x/24
/22
9186
natblock
185.31.154.x/24
/21
19607
natblock
185.31.150.x/24
/20
35625
natblock
185.31.142.x/24
/19
59913
natblock
185.31.190.x/24
/18
198381
natblock
185.31.222.x/24
/17
34738
natblock
185.31.30.x/24
/16
60498
natblock
185.30.158.x/24
/15
12843
natblock
185.29.158.x/24
/14
60533
natblock
185.27.158.x/24
/13
20647
natblock
185.23.158.x/24
/12
28748
natblock
185.15.158.x/24
/11
62197
natblock
185.63.158.x/24
/10
201841
natblock
185.95.158.x/24
/9
24750
natblock
185.159.158.x/24
/8
56704
natblock
Meaning of status in Received column:
natblock
Spoofed probe packets appear to be blocked by your local NAT or firewall rather than being rewritten with a public source address.
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.
