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 (138.97.206.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
138.97.206.x/24
/31
264196
natblock
138.97.206.x/24
/30
264196
natblock
138.97.206.x/24
/29
264196
natblock
138.97.206.x/24
/28
264196
natblock
138.97.206.x/24
/27
264196
natblock
138.97.206.x/24
/26
264196
natblock
138.97.206.x/24
/25
264196
natblock
138.97.206.x/24
/24
264196
natblock
138.97.207.x/24
/23
264196
natblock
138.97.204.x/24
/22
264196
natblock
138.97.202.x/24
/21
263800
natblock
138.97.198.x/24
/20
264195
natblock
138.97.222.x/24
/19
264209
natblock
138.97.238.x/24
/18
28100
natblock
138.97.142.x/24
/17
27729
natblock
138.97.78.x/24
/16
270909
natblock
138.96.206.x/24
/15
776
natblock
138.99.206.x/24
/14
52686
natblock
138.101.206.x/24
/13
9593
natblock
138.105.206.x/24
/12
8075
natblock
138.113.206.x/24
/11
54994
natblock
138.65.206.x/24
/10
749
natblock
138.33.206.x/24
/9
UNROUTED
natblock
138.225.206.x/24
/8
20868
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.