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 which rewrites the source addresses of the test traffic. To test your provider's network further, you must remove the NAT/firewall/router and connect directly.
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 (103.152.113.x/24) can spoof 511 neighboring addresses (within your /23 prefix)
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
103.152.113.x/24
/31
46997
yes
103.152.113.x/24
/30
46997
yes
103.152.113.x/24
/29
46997
yes
103.152.113.x/24
/28
46997
yes
103.152.113.x/24
/27
46997
yes
103.152.113.x/24
/26
46997
yes
103.152.113.x/24
/25
46997
yes
103.152.113.x/24
/24
46997
yes
103.152.112.x/24
/23
46997
yes
103.152.115.x/24
/22
140845
no
103.152.117.x/24
/21
136969
no
103.152.121.x/24
/20
UNROUTED
no
103.152.97.x/24
/19
133815
no
103.152.81.x/24
/18
4800
no
103.152.49.x/24
/17
140739
no
103.152.241.x/24
/16
140449
no
103.153.113.x/24
/15
140920
no
103.154.113.x/24
/14
131111
no
103.156.113.x/24
/13
63859
no
103.144.113.x/24
/12
UNROUTED
no
103.136.113.x/24
/11
UNROUTED
no
103.184.113.x/24
/10
140825
no
103.216.113.x/24
/9
63765
no
103.24.113.x/24
/8
56089
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
yes
2602:feda:dxx::/40
/112
46997
yes
2602:feda:dxx::/40
/104
46997
yes
2602:feda:dxx::/40
/96
46997
yes
2602:feda:dxx::/40
/88
46997
yes
2602:feda:dxx::/40
/80
46997
yes
2602:feda:dxx::/40
/72
46997
yes
2602:feda:dxx::/40
/64
46997
yes
2602:feda:dxx::/40
/56
46997
yes
2602:feda:dxx::/40
/48
46997
yes
2602:feda:dxx::/40
/40
UNROUTED
rewritten
2602:feda:8dxx::/40
/32
UNROUTED
rewritten
2602:fe5a:dxx::/40
/24
UNROUTED
rewritten
2602:7eda:dxx::/40
/16
UNROUTED
rewritten
Meaning of status in Received column:
yes
Packets spoofed from adjacent netblock were received (but that netblock is within the source AS)
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.
Summary:
The results from all tests are aggregated to produce a summary
"State of IP Spoofing" report.
