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 (187.63.123.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
187.63.123.x/24
/31
270774
natblock
187.63.123.x/24
/30
270774
natblock
187.63.123.x/24
/29
270774
natblock
187.63.123.x/24
/28
270774
natblock
187.63.123.x/24
/27
270774
natblock
187.63.123.x/24
/26
270774
natblock
187.63.123.x/24
/25
270774
natblock
187.63.123.x/24
/24
270774
natblock
187.63.122.x/24
/23
270774
natblock
187.63.121.x/24
/22
270774
natblock
187.63.127.x/24
/21
270778
natblock
187.63.115.x/24
/20
UNROUTED
natblock
187.63.107.x/24
/19
53111
natblock
187.63.91.x/24
/18
262665
natblock
187.63.59.x/24
/17
28164
natblock
187.63.251.x/24
/16
UNROUTED
natblock
187.62.123.x/24
/15
28394
natblock
187.61.123.x/24
/14
262952
natblock
187.59.123.x/24
/13
18881
natblock
187.55.123.x/24
/12
8167
natblock
187.47.123.x/24
/11
26615
natblock
187.31.123.x/24
/10
14571
natblock
187.127.123.x/24
/9
7738
natblock
187.191.123.x/24
/8
262545
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 Adjacent Netblock Testing:
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
2804:7e90:fcxx::/40
/120
271632
no
2804:7e90:fcxx::/40
/112
271632
no
2804:7e90:fcxx::/40
/104
271632
no
2804:7e90:fcxx::/40
/96
271632
no
2804:7e90:fcxx::/40
/88
271632
no
2804:7e90:fcxx::/40
/80
271632
no
2804:7e90:fcxx::/40
/72
271632
no
2804:7e90:fcxx::/40
/64
271632
no
2804:7e90:fcxx::/40
/56
271632
no
2804:7e90:fcxx::/40
/48
271632
no
2804:7e90:fcxx::/40
/40
271632
no
2804:7e90:7cxx::/40
/32
UNROUTED
no
2804:7e10:fcxx::/40
/24
271600
no
2804:fe90:fcxx::/40
/16
UNROUTED
no
Meaning of status in Received column:
no
Packets spoofed from adjacent netblock were not received, probably due to blocking
Summary:
The results from all tests are aggregated to produce a summary
"State of IP Spoofing" report.
