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Session Report

Summary:
Test run at: 2022-12-31 22:11:19 GMT
Client Prefix (v4): 72.172.222.x/24
Client AS (v4): 11976 (FIDN)
IPv4 Probes: 60
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 rewritten
Routable received
Largest spoofable neighbor prefix length /28
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 (72.172.222.x/24) can spoof 15 neighboring addresses (within your /28 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
72.172.222.x/24/3111976rewritten
72.172.222.x/24/3011976rewritten
72.172.222.x/24/2911976rewritten
72.172.222.x/24/2811976yes
72.172.222.x/24/2711976rewritten
72.172.222.x/24/2611976rewritten
72.172.222.x/24/2511976rewritten
72.172.222.x/24/2411976rewritten
72.172.223.x/24/2311976rewritten
72.172.220.x/24/2211976rewritten
72.172.218.x/24/2111976rewritten
72.172.214.x/24/2011976rewritten
72.172.206.x/24/1911976rewritten
72.172.254.x/24/18UNROUTEDrewritten
72.172.158.x/24/17UNROUTEDrewritten
72.172.94.x/24/16UNROUTEDrewritten
72.173.222.x/24/157155rewritten
72.174.222.x/24/1433588rewritten
72.168.222.x/24/13UNROUTEDrewritten
72.164.222.x/24/12209rewritten
72.188.222.x/24/1133363rewritten
72.140.222.x/24/10812rewritten
72.236.222.x/24/93356rewritten
72.44.222.x/24/812025rewritten

Meaning of status in Received column:

yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)
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 10 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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