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 (68.174.173.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
68.174.173.x/24
/31
12271
natblock
68.174.173.x/24
/30
12271
natblock
68.174.173.x/24
/29
12271
natblock
68.174.173.x/24
/28
12271
natblock
68.174.173.x/24
/27
12271
natblock
68.174.173.x/24
/26
12271
natblock
68.174.173.x/24
/25
12271
natblock
68.174.173.x/24
/24
12271
natblock
68.174.172.x/24
/23
12271
natblock
68.174.175.x/24
/22
12271
natblock
68.174.169.x/24
/21
12271
rewritten
68.174.165.x/24
/20
12271
rewritten
68.174.189.x/24
/19
12271
rewritten
68.174.141.x/24
/18
12271
rewritten
68.174.237.x/24
/17
12271
rewritten
68.174.45.x/24
/16
12271
rewritten
68.175.173.x/24
/15
11351
rewritten
68.172.173.x/24
/14
11351
rewritten
68.170.173.x/24
/13
23316
rewritten
68.166.173.x/24
/12
18566
rewritten
68.190.173.x/24
/11
20115
rewritten
68.142.173.x/24
/10
23432
rewritten
68.238.173.x/24
/9
5650
rewritten
68.46.173.x/24
/8
7922
rewritten
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.
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.
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 Adjacent Netblock Testing:
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
2604:2000:13xx::/40
/120
12271
no
2604:2000:13xx::/40
/112
12271
no
2604:2000:13xx::/40
/104
12271
yes
2604:2000:13xx::/40
/96
12271
yes
2604:2000:13xx::/40
/88
12271
yes
2604:2000:13xx::/40
/80
12271
yes
2604:2000:13xx::/40
/72
12271
yes
2604:2000:13xx::/40
/64
12271
yes
2604:2000:13xx::/40
/56
12271
no
2604:2000:13xx::/40
/48
12271
no
2604:2000:13xx::/40
/40
12271
no
2604:2000:93xx::/40
/32
12271
no
2604:2080:13xx::/40
/24
UNROUTED
no
2604:a000:13xx::/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.
