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Session Report

Summary:
Test run at: 2022-06-16 06:22:51 GMT
Client Prefix (v4): 73.9.148.x/24
Client AS (v4): 7922 (COMCAST-7922)
IPv4 Probes: 60
Client Prefix (v6): 2601:240:dfxx::/40
Client AS (v6): 7922 (COMCAST-7922)
IPv6 Probes: 56
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA unknownunknown
Routable unknownunknown
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 (73.9.148.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
73.9.148.x/24/317922sendto
73.9.148.x/24/307922sendto
73.9.148.x/24/297922sendto
73.9.148.x/24/287922sendto
73.9.148.x/24/277922sendto
73.9.148.x/24/267922sendto
73.9.148.x/24/257922sendto
73.9.148.x/24/247922sendto
73.9.149.x/24/237922sendto
73.9.150.x/24/227922sendto
73.9.144.x/24/217922sendto
73.9.156.x/24/207922sendto
73.9.132.x/24/197922natblock
73.9.180.x/24/187922sendto
73.9.212.x/24/177922sendto
73.9.20.x/24/167922sendto
73.8.148.x/24/157922sendto
73.11.148.x/24/147922sendto
73.13.148.x/24/137922sendto
73.1.148.x/24/127922sendto
73.25.148.x/24/117922sendto
73.41.148.x/24/107922sendto
73.73.148.x/24/97922sendto
73.137.148.x/24/87922sendto

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.
sendtoThe spoofer client was unable to send spoofed headers due to an operating system restriction.

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
2601:240:dfxx::/40/1207922sendto
2601:240:dfxx::/40/1127922sendto
2601:240:dfxx::/40/1047922sendto
2601:240:dfxx::/40/967922sendto
2601:240:dfxx::/40/887922sendto
2601:240:dfxx::/40/807922sendto
2601:240:dfxx::/40/727922sendto
2601:240:dfxx::/40/647922sendto
2601:240:dfxx::/40/567922sendto
2601:240:dfxx::/40/487922sendto
2601:240:dfxx::/40/407922sendto
2601:240:5fxx::/40/327922sendto
2601:2c0:dfxx::/40/247922sendto
2601:8240:dfxx::/40/16UNROUTEDsendto

Meaning of status in Received column:

sendtoThe spoofer client was unable to send spoofed headers due to an operating system restriction.
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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