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 (217.24.20.x/24) can spoof 31 neighboring addresses (within your /27 prefix)
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
217.24.20.x/24
/31
25431
yes
217.24.20.x/24
/30
25431
yes
217.24.20.x/24
/29
25431
natblock
217.24.20.x/24
/28
25431
yes
217.24.20.x/24
/27
25431
yes
217.24.20.x/24
/26
25431
natblock
217.24.20.x/24
/25
25431
natblock
217.24.20.x/24
/24
25431
natblock
217.24.21.x/24
/23
25431
natblock
217.24.22.x/24
/22
25431
natblock
217.24.16.x/24
/21
25431
natblock
217.24.28.x/24
/20
25431
natblock
217.24.4.x/24
/19
15844
natblock
217.24.52.x/24
/18
28876
natblock
217.24.84.x/24
/17
28855
natblock
217.24.148.x/24
/16
58224
natblock
217.25.20.x/24
/15
39232
natblock
217.26.20.x/24
/14
41783
natblock
217.28.20.x/24
/13
25582
natblock
217.16.20.x/24
/12
25532
natblock
217.8.20.x/24
/11
13285
natblock
217.56.20.x/24
/10
3269
natblock
217.88.20.x/24
/9
3320
natblock
217.152.20.x/24
/8
719
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 1 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
2001:48d0:101:501::159
2001:48d0:101:501::247
no
2001:4978:1fb:6400::d2
2001:48d0:101:501::247
no
2001:49aa:111:aa00::11
2001:48d0:101:501::247
no
fd11:1111:1111::1111
2001:48d0:101:501::247
no
2001:48d0:101:501::159
2001:610:510:115:192:42:115:98
no
2001:4978:1fb:6400::d2
2001:610:510:115:192:42:115:98
no
2001:49aa:111:aa00::11
2001:610:510:115:192:42:115:98
no
fd11:1111:1111::1111
2001:610:510:115:192:42:115:98
no
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
2001:470:21xx::/40
/120
6939
no
2001:470:21xx::/40
/112
6939
no
2001:470:21xx::/40
/104
6939
yes
2001:470:21xx::/40
/96
6939
yes
2001:470:21xx::/40
/88
6939
yes
2001:470:21xx::/40
/80
6939
no
2001:470:21xx::/40
/72
6939
yes
2001:470:21xx::/40
/64
6939
no
2001:470:21xx::/40
/56
6939
no
2001:470:21xx::/40
/48
6939
no
2001:470:21xx::/40
/40
6939
no
2001:470:a1xx::/40
/32
6939
no
2001:4f0:21xx::/40
/24
UNROUTED
no
2001:8470:21xx::/40
/16
1221
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.
