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.
Warnings:
⚠️ Your host is behind a Network Address Translation (NAT) router or firewall but spoofed packets are still being received without modification. See here for more information.
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 (147.235.204.x/24) can spoof 8388607 neighboring addresses (within your /9 prefix)
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
147.235.204.x/24
/31
6810
yes
147.235.204.x/24
/30
6810
yes
147.235.204.x/24
/29
6810
yes
147.235.204.x/24
/28
6810
yes
147.235.204.x/24
/27
6810
yes
147.235.204.x/24
/26
6810
yes
147.235.204.x/24
/25
6810
yes
147.235.204.x/24
/24
6810
yes
147.235.205.x/24
/23
6810
yes
147.235.206.x/24
/22
6810
yes
147.235.200.x/24
/21
6810
yes
147.235.196.x/24
/20
6810
yes
147.235.220.x/24
/19
6810
yes
147.235.236.x/24
/18
6810
yes
147.235.140.x/24
/17
UNROUTED
natblock
147.235.76.x/24
/16
208905
yes
147.234.204.x/24
/15
30866
yes
147.233.204.x/24
/14
378
yes
147.239.204.x/24
/13
367
yes
147.227.204.x/24
/12
668
yes
147.251.204.x/24
/11
2852
yes
147.203.204.x/24
/10
11320
yes
147.171.204.x/24
/9
1942
yes
147.107.204.x/24
/8
UNROUTED
natblock
Meaning of status in Received column:
yes
Packets spoofed from adjacent netblock were received
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 10 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
2a06:c701:43xx::/40
/120
6810
yes
2a06:c701:43xx::/40
/112
6810
yes
2a06:c701:43xx::/40
/104
6810
yes
2a06:c701:43xx::/40
/96
6810
yes
2a06:c701:43xx::/40
/88
6810
yes
2a06:c701:43xx::/40
/80
6810
yes
2a06:c701:43xx::/40
/72
6810
yes
2a06:c701:43xx::/40
/64
6810
yes
2a06:c701:43xx::/40
/56
6810
no
2a06:c701:43xx::/40
/48
6810
no
2a06:c701:43xx::/40
/40
6810
no
2a06:c701:c3xx::/40
/32
6810
no
2a06:c781:43xx::/40
/24
198024
no
2a06:4701:43xx::/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.
