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Session Report

Summary:
Test run at: 2021-03-06 21:27:20 GMT
Client Prefix (v4): 191.215.216.x/24
Client AS (v4): 7738
IPv4 Probes: 69
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 (191.215.216.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
191.215.216.x/24/317738rewritten
191.215.216.x/24/307738rewritten
191.215.216.x/24/297738rewritten
191.215.216.x/24/287738rewritten
191.215.216.x/24/277738rewritten
191.215.216.x/24/267738rewritten
191.215.216.x/24/257738rewritten
191.215.216.x/24/247738rewritten
191.215.217.x/24/237738rewritten
191.215.218.x/24/227738rewritten
191.215.220.x/24/217738rewritten
191.215.208.x/24/207738rewritten
191.215.200.x/24/197738rewritten
191.215.248.x/24/187738rewritten
191.215.152.x/24/177738rewritten
191.215.88.x/24/167738rewritten
191.214.216.x/24/157738rewritten
191.213.216.x/24/147738rewritten
191.211.216.x/24/1326599rewritten
191.223.216.x/24/128167rewritten
191.199.216.x/24/1126599rewritten
191.247.216.x/24/1022085rewritten
191.151.216.x/24/926611rewritten
191.87.216.x/24/826615rewritten

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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