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Session Report

Summary:
Test run at: 2022-06-22 01:41:55 GMT
Client Prefix (v4): 76.105.139.x/24
Client AS (v4): 7922 (COMCAST-7922)
IPv4 Probes: 60
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 (76.105.139.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
76.105.139.x/24/317922rewritten
76.105.139.x/24/307922rewritten
76.105.139.x/24/297922rewritten
76.105.139.x/24/287922rewritten
76.105.139.x/24/277922rewritten
76.105.139.x/24/267922rewritten
76.105.139.x/24/257922rewritten
76.105.139.x/24/247922rewritten
76.105.138.x/24/237922rewritten
76.105.137.x/24/227922rewritten
76.105.143.x/24/217922rewritten
76.105.131.x/24/207922rewritten
76.105.155.x/24/197922rewritten
76.105.171.x/24/187922rewritten
76.105.203.x/24/177922rewritten
76.105.11.x/24/167922rewritten
76.104.139.x/24/157922rewritten
76.107.139.x/24/147922rewritten
76.109.139.x/24/137922rewritten
76.97.139.x/24/127922rewritten
76.121.139.x/24/117922rewritten
76.73.139.x/24/1012083rewritten
76.41.139.x/24/9UNROUTEDrewritten
76.233.139.x/24/87018rewritten

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 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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