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.
Warnings:
⚠️ Your host is behind a Network Address Translation (NAT) router or firewall but spoofed packets are still being received without modification. See here for more information.
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 (216.145.53.x/24) can spoof 32767 neighboring addresses (within your /17 prefix)
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
216.145.53.x/24
/31
7233
natblock
216.145.53.x/24
/30
7233
natblock
216.145.53.x/24
/29
7233
natblock
216.145.53.x/24
/28
7233
natblock
216.145.53.x/24
/27
7233
natblock
216.145.53.x/24
/26
7233
natblock
216.145.53.x/24
/25
7233
natblock
216.145.53.x/24
/24
7233
natblock
216.145.52.x/24
/23
7233
natblock
216.145.55.x/24
/22
7233
natblock
216.145.49.x/24
/21
7233
natblock
216.145.61.x/24
/20
7233
natblock
216.145.37.x/24
/19
UNROUTED
natblock
216.145.21.x/24
/18
6295
natblock
216.145.117.x/24
/17
10628
yes
216.145.181.x/24
/16
23030
natblock
216.144.53.x/24
/15
UNROUTED
natblock
216.147.53.x/24
/14
11022
natblock
216.149.53.x/24
/13
2828
natblock
216.153.53.x/24
/12
6203
natblock
216.129.53.x/24
/11
15290
natblock
216.177.53.x/24
/10
15076
natblock
216.209.53.x/24
/9
577
natblock
216.17.53.x/24
/8
10242
natblock
Meaning of status in Received column:
yes
Packets spoofed from adjacent netblock were received
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.
IPv6 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.
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
2001:4998:efxx::/40
/120
7233
no
2001:4998:efxx::/40
/112
7233
no
2001:4998:efxx::/40
/104
7233
no
2001:4998:efxx::/40
/96
7233
no
2001:4998:efxx::/40
/88
7233
no
2001:4998:efxx::/40
/80
7233
no
2001:4998:efxx::/40
/72
7233
no
2001:4998:efxx::/40
/64
7233
no
2001:4998:efxx::/40
/56
7233
no
2001:4998:efxx::/40
/48
7233
no
2001:4998:efxx::/40
/40
10310
no
2001:4998:6fxx::/40
/32
10310
no
2001:4918:efxx::/40
/24
7849
no
2001:c998:efxx::/40
/16
UNROUTED
no
Meaning of status in Received column:
no
Packets spoofed from adjacent netblock were not received, probably due to blocking
Summary:
The results from all tests are aggregated to produce a summary
"State of IP Spoofing" report.
