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 (103.141.193.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
103.141.193.x/24
/31
136644
rewritten
103.141.193.x/24
/30
136644
rewritten
103.141.193.x/24
/29
136644
rewritten
103.141.193.x/24
/28
136644
rewritten
103.141.193.x/24
/27
136644
rewritten
103.141.193.x/24
/26
136644
rewritten
103.141.193.x/24
/25
136644
rewritten
103.141.193.x/24
/24
136644
rewritten
103.141.192.x/24
/23
136644
rewritten
103.141.195.x/24
/22
UNROUTED
rewritten
103.141.197.x/24
/21
UNROUTED
rewritten
103.141.201.x/24
/20
139642
rewritten
103.141.209.x/24
/19
134480
rewritten
103.141.225.x/24
/18
136744
rewritten
103.141.129.x/24
/17
UNROUTED
rewritten
103.141.65.x/24
/16
139325
rewritten
103.140.193.x/24
/15
UNROUTED
rewritten
103.143.193.x/24
/14
UNROUTED
rewritten
103.137.193.x/24
/13
UNROUTED
rewritten
103.133.193.x/24
/12
38868
rewritten
103.157.193.x/24
/11
141122
rewritten
103.173.193.x/24
/10
UNROUTED
rewritten
103.205.193.x/24
/9
4837
rewritten
103.13.193.x/24
/8
136141
rewritten
Meaning of status in Received column:
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 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
2001:df1:7xx::/40
/120
136644
no
2001:df1:7xx::/40
/112
136644
no
2001:df1:7xx::/40
/104
136644
no
2001:df1:7xx::/40
/96
136644
yes
2001:df1:7xx::/40
/88
136644
yes
2001:df1:7xx::/40
/80
136644
no
2001:df1:7xx::/40
/72
136644
no
2001:df1:7xx::/40
/64
136644
no
2001:df1:7xx::/40
/56
136644
no
2001:df1:7xx::/40
/48
136644
no
2001:df1:7xx::/40
/40
UNROUTED
no
2001:df1:87xx::/40
/32
UNROUTED
no
2001:d71:7xx::/40
/24
7671
no
2001:8df1:7xx::/40
/16
1221
yes
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
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.
