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 (167.250.203.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
167.250.203.x/24
/31
265226
rewritten
167.250.203.x/24
/30
265226
rewritten
167.250.203.x/24
/29
265226
rewritten
167.250.203.x/24
/28
265226
rewritten
167.250.203.x/24
/27
265226
rewritten
167.250.203.x/24
/26
265226
rewritten
167.250.203.x/24
/25
265226
rewritten
167.250.203.x/24
/24
265226
rewritten
167.250.202.x/24
/23
265226
rewritten
167.250.201.x/24
/22
265226
rewritten
167.250.207.x/24
/21
262253
rewritten
167.250.195.x/24
/20
264654
rewritten
167.250.219.x/24
/19
265224
rewritten
167.250.235.x/24
/18
265211
rewritten
167.250.139.x/24
/17
28598
rewritten
167.250.75.x/24
/16
265197
rewritten
167.251.203.x/24
/15
14946
rewritten
167.248.203.x/24
/14
30404
rewritten
167.254.203.x/24
/13
16831
rewritten
167.242.203.x/24
/12
30356
rewritten
167.234.203.x/24
/11
3525
rewritten
167.218.203.x/24
/10
3136
rewritten
167.186.203.x/24
/9
UNROUTED
rewritten
167.122.203.x/24
/8
UNROUTED
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
2804:2c8c:85xx::/40
/120
265226
no
2804:2c8c:85xx::/40
/112
265226
no
2804:2c8c:85xx::/40
/104
265226
no
2804:2c8c:85xx::/40
/96
265226
no
2804:2c8c:85xx::/40
/88
265226
no
2804:2c8c:85xx::/40
/80
265226
no
2804:2c8c:85xx::/40
/72
265226
no
2804:2c8c:85xx::/40
/64
265226
no
2804:2c8c:85xx::/40
/56
265226
no
2804:2c8c:85xx::/40
/48
265226
no
2804:2c8c:85xx::/40
/40
265226
no
2804:2c8c:5xx::/40
/32
265226
no
2804:2c0c:85xx::/40
/24
UNROUTED
no
2804:ac8c:85xx::/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.