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Session Report

Summary:
Test run at: 2018-07-16 18:13:46 GMT
Client Prefix (v4): 66.228.162.x/24
Client AS (v4): 7233 (YAHOO-US)
IPv4 Probes: 99
Client Prefix (v6): 2001:4998:efxx::/40
Client AS (v6): 7233 (YAHOO-US)
IPv6 Probes: 65
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA receivedreceived
Routable receivedreceived
Largest spoofable neighbor prefix length /8/16
Spoof status key
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 (66.228.162.x/24) can spoof 16777215 neighboring addresses (within your /8 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
66.228.162.x/24/317233yes
66.228.162.x/24/307233yes
66.228.162.x/24/297233yes
66.228.162.x/24/287233yes
66.228.162.x/24/277233yes
66.228.162.x/24/267233yes
66.228.162.x/24/257233yes
66.228.162.x/24/247233yes
66.228.163.x/24/237233yes
66.228.160.x/24/227233yes
66.228.166.x/24/217233yes
66.228.170.x/24/207233yes
66.228.178.x/24/19UNROUTEDyes
66.228.130.x/24/1819337yes
66.228.226.x/24/1725637yes
66.228.34.x/24/1663949yes
66.229.162.x/24/157922yes
66.230.162.x/24/1423393yes
66.224.162.x/24/137385yes
66.236.162.x/24/122828yes
66.244.162.x/24/1116399yes
66.196.162.x/24/1012281yes
66.164.162.x/24/911492yes
66.100.162.x/24/83561yes

Meaning of status in Received column:

yesPackets spoofed from adjacent netblock were received
yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)

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
2001:4998:efxx::/40/1207233yes
2001:4998:efxx::/40/1127233yes
2001:4998:efxx::/40/1047233yes
2001:4998:efxx::/40/967233yes
2001:4998:efxx::/40/887233yes
2001:4998:efxx::/40/807233yes
2001:4998:efxx::/40/727233yes
2001:4998:efxx::/40/647233yes
2001:4998:efxx::/40/567233yes
2001:4998:efxx::/40/487233yes
2001:4998:efxx::/40/4010310yes
2001:4998:6fxx::/40/3210310yes
2001:4918:efxx::/40/247849yes
2001:c998:efxx::/40/16UNROUTEDyes

Meaning of status in Received column:

yesPackets spoofed from adjacent netblock were received
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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