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Session Report

Summary:
Test run at: 2018-06-05 21:46:29 GMT
Client Prefix (v4): 209.131.62.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 unknownblocked
Routable unknownblocked
Largest spoofable neighbor prefix length none/120
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/24/31UNROUTEDnatblock
209.131.62.x/24/30UNROUTEDnatblock
209.131.62.x/24/29UNROUTEDnatblock
209.131.62.x/24/28UNROUTEDnatblock
209.131.62.x/24/27UNROUTEDnatblock
209.131.62.x/24/26UNROUTEDnatblock
209.131.62.x/24/25UNROUTEDnatblock
209.131.62.x/24/24UNROUTEDnatblock
209.131.63.x/24/23UNROUTEDnatblock
209.131.60.x/24/22UNROUTEDnatblock
209.131.58.x/24/21UNROUTEDnatblock
209.131.54.x/24/20UNROUTEDnatblock
209.131.46.x/24/19UNROUTEDnatblock
209.131.30.x/24/18UNROUTEDnatblock
209.131.126.x/24/17UNROUTEDnatblock
209.131.190.x/24/16UNROUTEDnatblock
209.130.62.x/24/15UNROUTEDnatblock
209.129.62.x/24/14UNROUTEDnatblock
209.135.62.x/24/13UNROUTEDnatblock
209.139.62.x/24/12UNROUTEDnatblock
209.147.62.x/24/11UNROUTEDnatblock
209.163.62.x/24/10UNROUTEDnatblock
209.195.62.x/24/9UNROUTEDnatblock
209.3.62.x/24/8UNROUTEDnatblock

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::/40/1207233yes
2001:4998:efxx::/40/112UNROUTEDno
2001:4998:efxx::/40/104UNROUTEDno
2001:4998:efxx::/40/96UNROUTEDno
2001:4998:efxx::/40/88UNROUTEDno
2001:4998:efxx::/40/80UNROUTEDno
2001:4998:efxx::/40/72UNROUTEDno
2001:4998:efxx::/40/64UNROUTEDno
2001:4998:efxx::/40/56UNROUTEDno
2001:4998:efxx::/40/48UNROUTEDno
2001:4998:efxx::/40/40UNROUTEDno
2001:4998:6fxx::/40/32UNROUTEDno
2001:4918:efxx::/40/24UNROUTEDno
2001:c998:efxx::/40/16UNROUTEDno

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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