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 (191.241.22.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
191.241.22.x/24
/31
263541
natblock
191.241.22.x/24
/30
263541
natblock
191.241.22.x/24
/29
263541
natblock
191.241.22.x/24
/28
263541
natblock
191.241.22.x/24
/27
263541
natblock
191.241.22.x/24
/26
263541
natblock
191.241.22.x/24
/25
263541
natblock
191.241.22.x/24
/24
263541
natblock
191.241.23.x/24
/23
263541
natblock
191.241.20.x/24
/22
263541
natblock
191.241.18.x/24
/21
262775
natblock
191.241.30.x/24
/20
263664
natblock
191.241.6.x/24
/19
263663
natblock
191.241.54.x/24
/18
263667
natblock
191.241.86.x/24
/17
53076
natblock
191.241.150.x/24
/16
262784
natblock
191.240.22.x/24
/15
28202
natblock
191.243.22.x/24
/14
263490
natblock
191.245.22.x/24
/13
22085
natblock
191.249.22.x/24
/12
18881
natblock
191.225.22.x/24
/11
26615
natblock
191.209.22.x/24
/10
27699
natblock
191.177.22.x/24
/9
28573
natblock
191.113.22.x/24
/8
7418
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.
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
no
2001:49aa:111:aa00::11
2001:48d0:101:501::242
no
fd11:1111:1111::1111
2001:48d0:101:501::242
yes
2001:48d0:101:501::159
2001:48d0:101:501::247
yes
2001:4978:1fb:6400::d2
2001:48d0:101:501::247
no
2001:49aa:111:aa00::11
2001:48d0:101:501::247
no
fd11:1111:1111::1111
2001:48d0:101:501::247
yes
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
2804:1398:3xx::/40
/120
263541
yes
2804:1398:3xx::/40
/112
263541
yes
2804:1398:3xx::/40
/104
263541
yes
2804:1398:3xx::/40
/96
263541
yes
2804:1398:3xx::/40
/88
263541
rewritten
2804:1398:3xx::/40
/80
263541
rewritten
2804:1398:3xx::/40
/72
263541
rewritten
2804:1398:3xx::/40
/64
263541
rewritten
2804:1398:3xx::/40
/56
263541
rewritten
2804:1398:3xx::/40
/48
263541
rewritten
2804:1398:3xx::/40
/40
263541
rewritten
2804:1398:83xx::/40
/32
263541
rewritten
2804:1318:3xx::/40
/24
263515
rewritten
2804:9398:3xx::/40
/16
13030
rewritten
Meaning of status in Received column:
yes
Packets spoofed from adjacent netblock were received (but that netblock is within the source AS)
rewritten
The source address of the probe packets we received differs from the spoofed address. It appears that an intermediate device is rewriting your packet headers.
Summary:
The results from all tests are aggregated to produce a summary
"State of IP Spoofing" report.