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 (185.35.183.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
185.35.183.x/24
/31
34347
natblock
185.35.183.x/24
/30
34347
natblock
185.35.183.x/24
/29
34347
natblock
185.35.183.x/24
/28
34347
natblock
185.35.183.x/24
/27
34347
natblock
185.35.183.x/24
/26
34347
natblock
185.35.183.x/24
/25
34347
natblock
185.35.183.x/24
/24
34347
natblock
185.35.182.x/24
/23
34347
natblock
185.35.181.x/24
/22
34347
natblock
185.35.179.x/24
/21
199996
natblock
185.35.191.x/24
/20
61408
natblock
185.35.167.x/24
/19
39923
natblock
185.35.151.x/24
/18
13213
natblock
185.35.247.x/24
/17
UNROUTED
natblock
185.35.55.x/24
/16
6848
natblock
185.34.183.x/24
/15
57214
natblock
185.33.183.x/24
/14
196763
natblock
185.39.183.x/24
/13
48592
natblock
185.43.183.x/24
/12
12956
natblock
185.51.183.x/24
/11
29314
natblock
185.3.183.x/24
/10
8749
natblock
185.99.183.x/24
/9
UNROUTED
natblock
185.163.183.x/24
/8
207187
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.
