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Session Report

Summary:
Test run at: 2022-10-03 05:30:25 GMT
Client Prefix (v4): 71.56.159.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 unknown
Routable unknown
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 (71.56.159.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
71.56.159.x/24/317922natblock
71.56.159.x/24/307922natblock
71.56.159.x/24/297922natblock
71.56.159.x/24/287922natblock
71.56.159.x/24/277922natblock
71.56.159.x/24/267922natblock
71.56.159.x/24/257922natblock
71.56.159.x/24/247922natblock
71.56.158.x/24/237922natblock
71.56.157.x/24/227922natblock
71.56.155.x/24/217922natblock
71.56.151.x/24/207922natblock
71.56.143.x/24/197922natblock
71.56.191.x/24/187922natblock
71.56.223.x/24/177922natblock
71.56.31.x/24/167922natblock
71.57.159.x/24/157922natblock
71.58.159.x/24/147922natblock
71.60.159.x/24/137922natblock
71.48.159.x/24/1214905natblock
71.40.159.x/24/1133363natblock
71.24.159.x/24/107922natblock
71.120.159.x/24/9701natblock
71.184.159.x/24/8701natblock

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.
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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