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Session Report

Summary:
Test run at: 2017-06-23 14:48:15 GMT
Client Prefix (v4): 174.63.81.x/24
Client AS (v4): 7922 (COMCAST-7922)
IPv4 Probes: 118
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 rewritten
Routable rewritten
Largest spoofable neighbor prefix length none
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 (174.63.81.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
174.63.81.x/24/317922rewritten
174.63.81.x/24/307922rewritten
174.63.81.x/24/297922rewritten
174.63.81.x/24/287922rewritten
174.63.81.x/24/277922rewritten
174.63.81.x/24/267922rewritten
174.63.81.x/24/257922rewritten
174.63.81.x/24/247922rewritten
174.63.80.x/24/237922rewritten
174.63.83.x/24/227922rewritten
174.63.85.x/24/217922rewritten
174.63.89.x/24/207922rewritten
174.63.65.x/24/197922rewritten
174.63.113.x/24/187922rewritten
174.63.17.x/24/177922rewritten
174.63.209.x/24/167922rewritten
174.62.81.x/24/157922rewritten
174.61.81.x/24/147922rewritten
174.59.81.x/24/137922rewritten
174.55.81.x/24/127922rewritten
174.47.81.x/24/113549rewritten
174.31.81.x/24/10209rewritten
174.127.81.x/24/936351natblock
174.191.81.x/24/87922natblock

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.
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 able to spoof routable, non-adjacent source addresses through the first 1 IP hop(s).
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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