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Session Report

Summary:
Test run at: 2017-12-18 06:06:19 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)
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 received
Routable received
Largest spoofable neighbor prefix length /8
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 16777215 neighboring addresses (within your /8 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
209.131.62.x/24/317233yes
209.131.62.x/24/307233yes
209.131.62.x/24/297233yes
209.131.62.x/24/287233yes
209.131.62.x/24/277233yes
209.131.62.x/24/267233yes
209.131.62.x/24/257233yes
209.131.62.x/24/247233yes
209.131.63.x/24/2310310yes
209.131.60.x/24/2210310yes
209.131.58.x/24/2110310yes
209.131.54.x/24/207233yes
209.131.46.x/24/19UNROUTEDyes
209.131.30.x/24/1812129yes
209.131.126.x/24/17UNROUTEDyes
209.131.190.x/24/16UNROUTEDyes
209.130.62.x/24/15UNROUTEDyes
209.129.62.x/24/142152yes
209.135.62.x/24/1311329yes
209.139.62.x/24/122914yes
209.147.62.x/24/112920yes
209.163.62.x/24/106983yes
209.195.62.x/24/96597yes
209.3.62.x/24/8209yes

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.
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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