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 (178.164.177.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
178.164.177.x/24
/31
20845
natblock
178.164.177.x/24
/30
20845
natblock
178.164.177.x/24
/29
20845
natblock
178.164.177.x/24
/28
20845
natblock
178.164.177.x/24
/27
20845
natblock
178.164.177.x/24
/26
20845
natblock
178.164.177.x/24
/25
20845
natblock
178.164.177.x/24
/24
20845
natblock
178.164.176.x/24
/23
20845
natblock
178.164.179.x/24
/22
20845
natblock
178.164.181.x/24
/21
20845
natblock
178.164.185.x/24
/20
20845
natblock
178.164.161.x/24
/19
20845
natblock
178.164.145.x/24
/18
20845
natblock
178.164.241.x/24
/17
20845
natblock
178.164.49.x/24
/16
34087
natblock
178.165.177.x/24
/15
25255
natblock
178.166.177.x/24
/14
12389
natblock
178.160.177.x/24
/13
12297
natblock
178.172.177.x/24
/12
59860
natblock
178.180.177.x/24
/11
12912
natblock
178.132.177.x/24
/10
8926
natblock
178.228.177.x/24
/9
31615
natblock
178.36.177.x/24
/8
12741
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
able to spoof routable, non-adjacent source addresses through the
first 1 IP hop(s).
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 probes:
Spoofed source address
Destination
Received
2001:48d0:101:501::159
2001:48d0:101:501::242
yes
2001:4978:1fb:6400::d2
2001:48d0:101:501::242
yes
2001:49aa:111:aa00::11
2001:48d0:101:501::242
yes
fd11:1111:1111::1111
2001:48d0:101:501::242
no
2001:48d0:101:501::159
2001:48d0:101:501::247
yes
2001:4978:1fb:6400::d2
2001:48d0:101:501::247
yes
2001:49aa:111:aa00::11
2001:48d0:101:501::247
yes
fd11:1111:1111::1111
2001:48d0:101:501::247
no
2001:48d0:101:501::159
2001:610:510:115:192:42:115:98
yes
2001:4978:1fb:6400::d2
2001:610:510:115:192:42:115:98
no
2001:49aa:111:aa00::11
2001:610:510:115:192:42:115:98
no
fd11:1111:1111::1111
2001:610:510:115:192:42:115:98
no
2001:48d0:101:501::159
2001:630:212:225:225:90ff:fe0c:45a6
yes
2001:4978:1fb:6400::d2
2001:630:212:225:225:90ff:fe0c:45a6
no
2001:49aa:111:aa00::11
2001:630:212:225:225:90ff:fe0c:45a6
no
fd11:1111:1111::1111
2001:630:212:225:225:90ff:fe0c:45a6
no
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
2a01:36d:1xx::/40
/120
20845
yes
2a01:36d:1xx::/40
/112
20845
yes
2a01:36d:1xx::/40
/104
20845
yes
2a01:36d:1xx::/40
/96
20845
yes
2a01:36d:1xx::/40
/88
20845
yes
2a01:36d:1xx::/40
/80
20845
yes
2a01:36d:1xx::/40
/72
20845
yes
2a01:36d:1xx::/40
/64
20845
yes
2a01:36d:1xx::/40
/56
20845
yes
2a01:36d:1xx::/40
/48
20845
yes
2a01:36d:1xx::/40
/40
20845
yes
2a01:36d:81xx::/40
/32
20845
yes
2a01:3ed:1xx::/40
/24
UNROUTED
yes
2a01:836d:1xx::/40
/16
UNROUTED
yes
Meaning of status in Received column:
yes
Packets spoofed from adjacent netblock were received (but that netblock is within the source AS)
Summary:
The results from all tests are aggregated to produce a summary
"State of IP Spoofing" report.