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 (91.193.65.x/24) can spoof 1023 neighboring addresses (within your /22 prefix)
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
91.193.65.x/24
/31
42936
yes
91.193.65.x/24
/30
42936
yes
91.193.65.x/24
/29
42936
yes
91.193.65.x/24
/28
42936
yes
91.193.65.x/24
/27
42936
yes
91.193.65.x/24
/26
42936
yes
91.193.65.x/24
/25
42936
yes
91.193.65.x/24
/24
42936
yes
91.193.64.x/24
/23
42936
yes
91.193.67.x/24
/22
42936
yes
91.193.69.x/24
/21
3326
natblock
91.193.73.x/24
/20
198884
natblock
91.193.81.x/24
/19
42723
natblock
91.193.97.x/24
/18
33951
natblock
91.193.1.x/24
/17
49788
natblock
91.193.193.x/24
/16
202483
natblock
91.192.65.x/24
/15
41329
natblock
91.195.65.x/24
/14
42707
natblock
91.197.65.x/24
/13
35025
natblock
91.201.65.x/24
/12
56630
natblock
91.209.65.x/24
/11
39264
natblock
91.225.65.x/24
/10
31683
natblock
91.129.65.x/24
/9
1257
natblock
91.65.65.x/24
/8
31334
natblock
Meaning of status in Received column:
yes
Packets spoofed from adjacent netblock were received (but that netblock is within the source AS)
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
able to spoof routable, non-adjacent source addresses through the
first 1 IP hop(s).
IPv6 probes:
Spoofed source address
Destination
Received
2001:48d0:101:501::159
2001:410:102:1::78
no
2001:4978:1fb:6400::d2
2001:410:102:1::78
no
2001:49aa:111:aa00::11
2001:410:102:1::78
no
fd11:1111:1111::1111
2001:410:102:1::78
no
2001:48d0:101:501::159
2001:48d0:101:501::242
no
2001:4978:1fb:6400::d2
2001:48d0:101:501::242
no
2001:49aa:111:aa00::11
2001:48d0:101:501::242
no
fd11:1111:1111::1111
2001:48d0:101:501::242
no
2001:48d0:101:501::159
2001:48d0:101:501::247
no
2001:4978:1fb:6400::d2
2001:48d0:101:501::247
no
2001:49aa:111:aa00::11
2001:48d0:101:501::247
no
fd11:1111:1111::1111
2001:48d0:101:501::247
no
2001:48d0:101:501::159
2607:f278:2:13:ba27:ebff:fe3f:b21e
no
2001:4978:1fb:6400::d2
2607:f278:2:13:ba27:ebff:fe3f:b21e
no
2001:49aa:111:aa00::11
2607:f278:2:13:ba27:ebff:fe3f:b21e
no
fd11:1111:1111::1111
2607:f278:2:13:ba27:ebff:fe3f:b21e
no
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)
Prefix Length
ASN of spoofed source address
Received
2001:67c:13xx::/40
/120
42936
yes
2001:67c:13xx::/40
/112
42936
yes
2001:67c:13xx::/40
/104
42936
yes
2001:67c:13xx::/40
/96
42936
yes
2001:67c:13xx::/40
/88
42936
yes
2001:67c:13xx::/40
/80
42936
yes
2001:67c:13xx::/40
/72
42936
yes
2001:67c:13xx::/40
/64
42936
yes
2001:67c:13xx::/40
/56
42936
yes
2001:67c:13xx::/40
/48
42936
yes
2001:67c:13xx::/40
/40
2485
no
2001:67c:93xx::/40
/32
UNROUTED
no
2001:6fc:13xx::/40
/24
UNROUTED
no
2001:867c:13xx::/40
/16
1221
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)
Summary:
The results from all tests are aggregated to produce a summary
"State of IP Spoofing" report.