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Session Report

Summary:
Test run at: 2021-05-06 16:05:49 GMT
Client Prefix (v4): 89.41.26.x/24
Client AS (v4): 9009 (M247)
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 /31
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 (89.41.26.x/24) can spoof 1 neighboring addresses (within your /31 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
89.41.26.x/24/319009yes
89.41.26.x/24/309009rewritten
89.41.26.x/24/299009rewritten
89.41.26.x/24/289009rewritten
89.41.26.x/24/279009rewritten
89.41.26.x/24/269009rewritten
89.41.26.x/24/259009rewritten
89.41.26.x/24/249009rewritten
89.41.27.x/24/23209686rewritten
89.41.24.x/24/2260194rewritten
89.41.30.x/24/21UNROUTEDrewritten
89.41.18.x/24/2039501rewritten
89.41.10.x/24/1939501rewritten
89.41.58.x/24/1839501rewritten
89.41.90.x/24/178926rewritten
89.41.154.x/24/166910rewritten
89.40.26.x/24/1535512rewritten
89.43.26.x/24/1434560rewritten
89.45.26.x/24/1331638rewritten
89.33.26.x/24/12205275rewritten
89.57.26.x/24/11207790rewritten
89.9.26.x/24/1012929rewritten
89.105.26.x/24/929297rewritten
89.169.26.x/24/831514rewritten

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 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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