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 (45.181.173.x/24) can spoof 255 neighboring addresses (within your /24 prefix)
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
45.181.173.x/24
/31
269224
yes
45.181.173.x/24
/30
269224
yes
45.181.173.x/24
/29
269224
yes
45.181.173.x/24
/28
269224
yes
45.181.173.x/24
/27
269224
yes
45.181.173.x/24
/26
269224
yes
45.181.173.x/24
/25
269224
yes
45.181.173.x/24
/24
269224
yes
45.181.172.x/24
/23
269224
no
45.181.175.x/24
/22
269224
no
45.181.169.x/24
/21
269196
no
45.181.165.x/24
/20
UNROUTED
no
45.181.189.x/24
/19
269735
no
45.181.141.x/24
/18
269187
no
45.181.237.x/24
/17
269205
no
45.181.45.x/24
/16
267798
no
45.180.173.x/24
/15
266724
no
45.183.173.x/24
/14
269767
no
45.177.173.x/24
/13
269038
no
45.189.173.x/24
/12
269860
no
45.165.173.x/24
/11
268684
no
45.149.173.x/24
/10
62240
no
45.245.173.x/24
/9
24863
no
45.53.173.x/24
/8
5650
no
Meaning of status in Received column:
no
Packets spoofed from adjacent netblock were not received, probably due to blocking
yes
Packets spoofed from adjacent netblock were received (but that netblock is within the source AS)
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.
