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Session Report

Summary:
Test run at: 2021-11-21 06:33:15 GMT
Client Prefix (v4): 72.105.142.x/24
Client AS (v4): 6167 (CELLCO-PART)
IPv4 Probes: 66
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 (72.105.142.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
72.105.142.x/24/316167rewritten
72.105.142.x/24/306167rewritten
72.105.142.x/24/296167rewritten
72.105.142.x/24/286167rewritten
72.105.142.x/24/276167natblock
72.105.142.x/24/266167rewritten
72.105.142.x/24/256167rewritten
72.105.142.x/24/246167rewritten
72.105.143.x/24/236167rewritten
72.105.140.x/24/226167rewritten
72.105.138.x/24/216167rewritten
72.105.134.x/24/206167rewritten
72.105.158.x/24/1922394rewritten
72.105.174.x/24/186167rewritten
72.105.206.x/24/176167rewritten
72.105.14.x/24/166167rewritten
72.104.142.x/24/156167rewritten
72.107.142.x/24/146167rewritten
72.109.142.x/24/136167rewritten
72.97.142.x/24/126167rewritten
72.121.142.x/24/116167rewritten
72.73.142.x/24/10UNROUTEDrewritten
72.41.142.x/24/9UNROUTEDrewritten
72.233.142.x/24/854032rewritten

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.
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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