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Session Report

Summary:
Test run at: 2018-04-04 15:42:08 GMT
Client Prefix (v4): 209.131.62.x/24
Client AS (v4): 7233 (YAHOO-US)
IPv4 Probes: 102
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 unknownunknown
Routable unknownunknown
Largest spoofable neighbor prefix length nonenone
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 (209.131.62.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
209.131.62.x/24/317233natblock
209.131.62.x/24/307233natblock
209.131.62.x/24/297233natblock
209.131.62.x/24/287233natblock
209.131.62.x/24/277233natblock
209.131.62.x/24/267233natblock
209.131.62.x/24/257233natblock
209.131.62.x/24/247233natblock
209.131.63.x/24/2310310natblock
209.131.60.x/24/2210310natblock
209.131.58.x/24/2110310natblock
209.131.54.x/24/207233natblock
209.131.46.x/24/19UNROUTEDnatblock
209.131.30.x/24/1812129natblock
209.131.126.x/24/17UNROUTEDnatblock
209.131.190.x/24/1611224natblock
209.130.62.x/24/15UNROUTEDnatblock
209.129.62.x/24/142152natblock
209.135.62.x/24/1311329natblock
209.139.62.x/24/122914natblock
209.147.62.x/24/112920natblock
209.163.62.x/24/106983natblock
209.195.62.x/24/96597natblock
209.3.62.x/24/8209natblock

Meaning of status in Received column:

natblockSpoofed 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
2001:4998:efxx::/40/1207233no
2001:4998:efxx::/40/1127233no
2001:4998:efxx::/40/1047233no
2001:4998:efxx::/40/967233no
2001:4998:efxx::/40/887233no
2001:4998:efxx::/40/807233no
2001:4998:efxx::/40/727233no
2001:4998:efxx::/40/647233no
2001:4998:efxx::/40/567233no
2001:4998:efxx::/40/487233no
2001:4998:efxx::/40/4010310no
2001:4998:6fxx::/40/3210310no
2001:4918:efxx::/40/247849no
2001:c998:efxx::/40/16UNROUTEDno

Meaning of status in Received column:

noPackets 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.
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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