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 (77.75.188.x/24) can spoof 0 neighboring addresses
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
77.75.188.x/24
/31
42973
natblock
77.75.188.x/24
/30
42973
natblock
77.75.188.x/24
/29
42973
natblock
77.75.188.x/24
/28
42973
natblock
77.75.188.x/24
/27
42973
natblock
77.75.188.x/24
/26
42973
natblock
77.75.188.x/24
/25
42973
natblock
77.75.188.x/24
/24
42973
natblock
77.75.189.x/24
/23
42973
natblock
77.75.190.x/24
/22
42973
natblock
77.75.184.x/24
/21
42973
natblock
77.75.180.x/24
/20
16030
natblock
77.75.172.x/24
/19
42972
natblock
77.75.156.x/24
/18
43247
natblock
77.75.252.x/24
/17
34432
natblock
77.75.60.x/24
/16
1239
natblock
77.74.188.x/24
/15
42988
natblock
77.73.188.x/24
/14
13126
natblock
77.79.188.x/24
/13
24955
natblock
77.67.188.x/24
/12
UNROUTED
natblock
77.91.188.x/24
/11
12975
natblock
77.107.188.x/24
/10
5413
natblock
77.11.188.x/24
/9
6805
natblock
77.203.188.x/24
/8
15557
natblock
Meaning of status in Received column:
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
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
2a02:40:xx::/40
/120
9009
no
2a02:40:xx::/40
/112
9009
no
2a02:40:xx::/40
/104
9009
no
2a02:40:xx::/40
/96
9009
no
2a02:40:xx::/40
/88
9009
no
2a02:40:xx::/40
/80
9009
no
2a02:40:xx::/40
/72
9009
no
2a02:40:xx::/40
/64
9009
no
2a02:40:xx::/40
/56
9009
no
2a02:40:xx::/40
/48
9009
no
2a02:40:xx::/40
/40
9009
no
2a02:40:80xx::/40
/32
9009
no
2a02:c0:xx::/40
/24
39029
no
2a02:8040:xx::/40
/16
25490
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.
