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 (23.247.137.x/24) can spoof 255 neighboring addresses (within your /24 prefix)
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
23.247.137.x/24
/31
46997
yes
23.247.137.x/24
/30
46997
yes
23.247.137.x/24
/29
46997
yes
23.247.137.x/24
/28
46997
yes
23.247.137.x/24
/27
46997
yes
23.247.137.x/24
/26
46997
yes
23.247.137.x/24
/25
46997
yes
23.247.137.x/24
/24
46997
yes
23.247.136.x/24
/23
46997
no
23.247.139.x/24
/22
38008
no
23.247.141.x/24
/21
UNROUTED
no
23.247.129.x/24
/20
UNROUTED
no
23.247.153.x/24
/19
398578
no
23.247.169.x/24
/18
142632
no
23.247.201.x/24
/17
14618
no
23.247.9.x/24
/16
32708
no
23.246.137.x/24
/15
UNROUTED
no
23.245.137.x/24
/14
UNROUTED
no
23.243.137.x/24
/13
20001
no
23.255.137.x/24
/12
16591
no
23.231.137.x/24
/11
132839
no
23.215.137.x/24
/10
16625
no
23.183.137.x/24
/9
UNROUTED
no
23.119.137.x/24
/8
7018
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)
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
2602:feda:dxx::/40
/120
46997
natblock
2602:feda:dxx::/40
/112
46997
natblock
2602:feda:dxx::/40
/104
46997
natblock
2602:feda:dxx::/40
/96
46997
natblock
2602:feda:dxx::/40
/88
46997
natblock
2602:feda:dxx::/40
/80
46997
natblock
2602:feda:dxx::/40
/72
46997
natblock
2602:feda:dxx::/40
/64
46997
natblock
2602:feda:dxx::/40
/56
46997
natblock
2602:feda:dxx::/40
/48
46997
natblock
2602:feda:dxx::/40
/40
UNROUTED
natblock
2602:feda:8dxx::/40
/32
UNROUTED
natblock
2602:fe5a:dxx::/40
/24
UNROUTED
natblock
2602:7eda:dxx::/40
/16
UNROUTED
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.
