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Session Report

Summary:
Test run at: 2017-02-27 02:59:11 GMT
Client Prefix (v4): 24.63.251.x/24
Client AS (v4): 7922 (COMCAST-7922)
IPv4 Probes: 92
Client Prefix (v6): 2001:558:14xx::/40
Client AS (v6): 7922 (COMCAST-7922)
IPv6 Probes: 72
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA rewrittenunknown
Routable rewrittenunknown
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 (24.63.251.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
24.63.251.x/24/317922rewritten
24.63.251.x/24/307922rewritten
24.63.251.x/24/297922rewritten
24.63.251.x/24/287922rewritten
24.63.251.x/24/277922rewritten
24.63.251.x/24/267922rewritten
24.63.251.x/24/257922rewritten
24.63.251.x/24/247922rewritten
24.63.250.x/24/237922rewritten
24.63.249.x/24/227922rewritten
24.63.255.x/24/217922rewritten
24.63.243.x/24/207922rewritten
24.63.235.x/24/197922rewritten
24.63.219.x/24/187922rewritten
24.63.187.x/24/177922rewritten
24.63.123.x/24/167922rewritten
24.62.251.x/24/157922rewritten
24.61.251.x/24/147922rewritten
24.59.251.x/24/1311351rewritten
24.55.251.x/24/127992rewritten
24.47.251.x/24/116128rewritten
24.31.251.x/24/1011427rewritten
24.127.251.x/24/97922rewritten
24.191.251.x/24/86128rewritten

Meaning of status in Received column:

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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