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 (212.8.253.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
212.8.253.x/24
/31
49981
natblock
212.8.253.x/24
/30
49981
natblock
212.8.253.x/24
/29
49981
natblock
212.8.253.x/24
/28
49981
natblock
212.8.253.x/24
/27
49981
natblock
212.8.253.x/24
/26
49981
natblock
212.8.253.x/24
/25
49981
natblock
212.8.253.x/24
/24
49981
natblock
212.8.252.x/24
/23
49981
natblock
212.8.255.x/24
/22
45352
natblock
212.8.249.x/24
/21
49981
natblock
212.8.245.x/24
/20
21100
natblock
212.8.237.x/24
/19
UNROUTED
natblock
212.8.221.x/24
/18
8925
natblock
212.8.189.x/24
/17
5400
natblock
212.8.125.x/24
/16
12338
natblock
212.9.253.x/24
/15
6703
natblock
212.10.253.x/24
/14
39642
natblock
212.12.253.x/24
/13
UNROUTED
natblock
212.0.253.x/24
/12
3257
natblock
212.24.253.x/24
/11
29255
natblock
212.40.253.x/24
/10
6739
natblock
212.72.253.x/24
/9
12859
natblock
212.136.253.x/24
/8
702
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
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
2a00:7c80:xx::/40
/120
49981
natblock
2a00:7c80:xx::/40
/112
49981
natblock
2a00:7c80:xx::/40
/104
49981
natblock
2a00:7c80:xx::/40
/96
49981
natblock
2a00:7c80:xx::/40
/88
49981
natblock
2a00:7c80:xx::/40
/80
49981
natblock
2a00:7c80:xx::/40
/72
49981
natblock
2a00:7c80:xx::/40
/64
49981
natblock
2a00:7c80:xx::/40
/56
49981
natblock
2a00:7c80:xx::/40
/48
49981
natblock
2a00:7c80:xx::/40
/40
49981
natblock
2a00:7c80:80xx::/40
/32
49981
natblock
2a00:7c00:xx::/40
/24
41783
natblock
2a00:fc80:xx::/40
/16
60781
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.
Summary:
The results from all tests are aggregated to produce a summary
"State of IP Spoofing" report.
