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 (213.5.92.x/24) can spoof 16777215 neighboring addresses (within your /8 prefix)
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
213.5.92.x/24
/31
8916
yes
213.5.92.x/24
/30
8916
yes
213.5.92.x/24
/29
8916
yes
213.5.92.x/24
/28
8916
yes
213.5.92.x/24
/27
8916
yes
213.5.92.x/24
/26
8916
yes
213.5.92.x/24
/25
8916
yes
213.5.92.x/24
/24
8916
yes
213.5.93.x/24
/23
8916
yes
213.5.94.x/24
/22
8916
yes
213.5.88.x/24
/21
8916
yes
213.5.84.x/24
/20
50141
yes
213.5.76.x/24
/19
UNROUTED
no
213.5.124.x/24
/18
50048
yes
213.5.28.x/24
/17
47156
yes
213.5.220.x/24
/16
31028
yes
213.4.92.x/24
/15
3352
yes
213.7.92.x/24
/14
6866
yes
213.1.92.x/24
/13
2856
yes
213.13.92.x/24
/12
3243
yes
213.21.92.x/24
/11
45011
yes
213.37.92.x/24
/10
6739
yes
213.69.92.x/24
/9
702
yes
213.133.92.x/24
/8
35432
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)
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).
Summary:
The results from all tests are aggregated to produce a summary
"State of IP Spoofing" report.
