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Session Report

Summary:
Test run at: 2019-01-24 12:53:26 GMT
Client Prefix (v4): 168.196.203.x/24
Client AS (v4): 52341
IPv4 Probes: 124
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 (168.196.203.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
168.196.203.x/24/3152341sendto
168.196.203.x/24/3052341rewritten
168.196.203.x/24/2952341rewritten
168.196.203.x/24/2852341rewritten
168.196.203.x/24/2752341sendto
168.196.203.x/24/2652341rewritten
168.196.203.x/24/2552341rewritten
168.196.203.x/24/2452341sendto
168.196.202.x/24/2352341rewritten
168.196.201.x/24/2252341rewritten
168.196.207.x/24/21265470rewritten
168.196.195.x/24/20265457sendto
168.196.219.x/24/19UNROUTEDrewritten
168.196.235.x/24/18265467rewritten
168.196.139.x/24/17264367rewritten
168.196.75.x/24/16265446sendto
168.197.203.x/24/15264774rewritten
168.198.203.x/24/14174rewritten
168.192.203.x/24/13UNROUTEDrewritten
168.204.203.x/24/12UNROUTEDrewritten
168.212.203.x/24/1110430rewritten
168.228.203.x/24/10262271rewritten
168.132.203.x/24/918191rewritten
168.68.203.x/24/84152rewritten

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.
sendtoThe spoofer client was unable to send spoofed headers due to an operating system restriction.

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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