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Session Report

Summary:
Test run at: 2021-11-23 01:45:54 GMT
Client Prefix (v4): 201.71.17.x/24
Client AS (v4): 270285
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

Meaning of result status in column:

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 (201.71.17.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
201.71.17.x/24/31270285rewritten
201.71.17.x/24/30270285rewritten
201.71.17.x/24/29270285rewritten
201.71.17.x/24/28270285rewritten
201.71.17.x/24/27270285rewritten
201.71.17.x/24/26270285rewritten
201.71.17.x/24/25270285rewritten
201.71.17.x/24/24270285rewritten
201.71.16.x/24/23270285rewritten
201.71.19.x/24/22270285rewritten
201.71.21.x/24/21270286rewritten
201.71.25.x/24/20270290rewritten
201.71.1.x/24/19269925rewritten
201.71.49.x/24/18270777rewritten
201.71.81.x/24/1727652rewritten
201.71.145.x/24/1628635rewritten
201.70.17.x/24/1517379rewritten
201.69.17.x/24/1427699rewritten
201.67.17.x/24/138167rewritten
201.79.17.x/24/127738rewritten
201.87.17.x/24/1119182rewritten
201.103.17.x/24/108151rewritten
201.7.17.x/24/98167rewritten
201.199.17.x/24/811830rewritten

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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