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Session Report

Summary:
Test run at: 2021-03-17 12:35:47 GMT
Client Prefix (v4): 70.90.166.x/24
Client AS (v4): 7922 (COMCAST-7922)
IPv4 Probes: 66
Client Prefix (v6): 2001:470:xx::/40
Client AS (v6): 6939 (HURRICANE)
IPv6 Probes: 56
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA rewrittenblocked
Routable rewrittenblocked
Largest spoofable neighbor prefix length none/64

Meaning of result status in column:

receivedSpoofed packet was received.Pattern of tests from this IP block indicates a switch from allowing spoofing to blocking it.
rewrittenSpoofed packet was received, but the source address was changed en route.
blockedSpoofed packet was not received, but unspoofed packet was.
unknownNeither spoofed nor unspoofed packet was received.

Warnings:

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 (70.90.166.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
70.90.166.x/24/317922rewritten
70.90.166.x/24/307922rewritten
70.90.166.x/24/297922rewritten
70.90.166.x/24/287922rewritten
70.90.166.x/24/277922rewritten
70.90.166.x/24/267922rewritten
70.90.166.x/24/257922rewritten
70.90.166.x/24/247922rewritten
70.90.167.x/24/237922rewritten
70.90.164.x/24/227922rewritten
70.90.162.x/24/217922rewritten
70.90.174.x/24/207922rewritten
70.90.182.x/24/197922rewritten
70.90.134.x/24/187922rewritten
70.90.230.x/24/177922rewritten
70.90.38.x/24/167922rewritten
70.91.166.x/24/157922rewritten
70.88.166.x/24/147922rewritten
70.94.166.x/24/1311427rewritten
70.82.166.x/24/125769rewritten
70.74.166.x/24/116327rewritten
70.122.166.x/24/1011427rewritten
70.26.166.x/24/9577rewritten
70.218.166.x/24/822394rewritten

Meaning of status in Received column:

rewrittenThe 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 probes:
Spoofed source addressDestinationReceived
2001:48d0:101:501::1592001:48d0:101:501::242no
2001:4978:1fb:6400::d22001:48d0:101:501::242no
2001:49aa:111:aa00::112001:48d0:101:501::242no
fd11:1111:1111::11112001:48d0:101:501::242no
2001:48d0:101:501::1592001:48d0:101:501::247no
2001:4978:1fb:6400::d22001:48d0:101:501::247no
2001:49aa:111:aa00::112001:48d0:101:501::247no
fd11:1111:1111::11112001:48d0:101:501::247no
2001:48d0:101:501::1592001:630:212:225:225:90ff:fe0c:45a6no
2001:4978:1fb:6400::d22001:630:212:225:225:90ff:fe0c:45a6no
2001:49aa:111:aa00::112001:630:212:225:225:90ff:fe0c:45a6no
fd11:1111:1111::11112001:630:212:225:225:90ff:fe0c:45a6no
2001:48d0:101:501::1592001:770:1c:7:225:90ff:fe0c:acb4no
2001:4978:1fb:6400::d22001:770:1c:7:225:90ff:fe0c:acb4no
2001:49aa:111:aa00::112001:770:1c:7:225:90ff:fe0c:acb4no
fd11:1111:1111::11112001:770:1c:7:225:90ff:fe0c:acb4no
2001:48d0:101:501::1592001:df0:4:800:21c:c0ff:feb2:ad5fno
2001:4978:1fb:6400::d22001:df0:4:800:21c:c0ff:feb2:ad5fno
2001:49aa:111:aa00::112001:df0:4:800:21c:c0ff:feb2:ad5fno
fd11:1111:1111::11112001:df0:4:800:21c:c0ff:feb2:ad5fno
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2001:470:xx::/40/1206939yes
2001:470:xx::/40/1126939yes
2001:470:xx::/40/1046939yes
2001:470:xx::/40/966939yes
2001:470:xx::/40/886939yes
2001:470:xx::/40/806939yes
2001:470:xx::/40/726939yes
2001:470:xx::/40/646939yes
2001:470:xx::/40/566939no
2001:470:xx::/40/486939no
2001:470:xx::/40/4047787no
2001:470:80xx::/40/326939no
2001:4f0:xx::/40/24UNROUTEDno
2001:8470:xx::/40/161221no

Meaning of status in Received column:

noPackets spoofed from adjacent netblock were not received, probably due to blocking
yesPackets 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.
Feedback:
We welcome questions and feedback to the Spoofer Information Mailing List and invite users to join the Spoofer Users Mailing List for discussion and announcements.
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