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 (212.237.175.x/24) can spoof 255 neighboring addresses (within your /24 prefix)
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
212.237.175.x/24
/31
48284
yes
212.237.175.x/24
/30
48284
yes
212.237.175.x/24
/29
48284
yes
212.237.175.x/24
/28
48284
yes
212.237.175.x/24
/27
48284
yes
212.237.175.x/24
/26
48284
yes
212.237.175.x/24
/25
48284
yes
212.237.175.x/24
/24
48284
yes
212.237.174.x/24
/23
48284
natblock
212.237.173.x/24
/22
48284
natblock
212.237.171.x/24
/21
48284
natblock
212.237.167.x/24
/20
8469
natblock
212.237.191.x/24
/19
197423
natblock
212.237.143.x/24
/18
203953
natblock
212.237.239.x/24
/17
29119
natblock
212.237.47.x/24
/16
31034
natblock
212.236.175.x/24
/15
8245
natblock
212.239.175.x/24
/14
5432
natblock
212.233.175.x/24
/13
29582
natblock
212.229.175.x/24
/12
UNROUTED
natblock
212.253.175.x/24
/11
34984
natblock
212.205.175.x/24
/10
6799
natblock
212.173.175.x/24
/9
5503
natblock
212.109.175.x/24
/8
12396
natblock
Meaning of status in Received column:
yes
Packets spoofed from adjacent netblock were received (but that netblock is within the source AS)
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 2 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
no
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
no
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
2a02:778:4xx::/40
/120
48284
yes
2a02:778:4xx::/40
/112
48284
yes
2a02:778:4xx::/40
/104
48284
yes
2a02:778:4xx::/40
/96
48284
yes
2a02:778:4xx::/40
/88
48284
yes
2a02:778:4xx::/40
/80
48284
yes
2a02:778:4xx::/40
/72
48284
yes
2a02:778:4xx::/40
/64
48284
yes
2a02:778:4xx::/40
/56
48284
yes
2a02:778:4xx::/40
/48
48284
yes
2a02:778:4xx::/40
/40
48284
no
2a02:778:84xx::/40
/32
48284
no
2a02:7f8:4xx::/40
/24
UNROUTED
no
2a02:8778:4xx::/40
/16
UNROUTED
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)
Summary:
The results from all tests are aggregated to produce a summary
"State of IP Spoofing" report.
