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Session Report

Summary:
Test run at: 2019-09-27 13:01:46 GMT
Client Prefix (v4): 131.196.40.x/24
Client AS (v4): 265967
IPv4 Probes: 72
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 (131.196.40.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
131.196.40.x/24/31265967rewritten
131.196.40.x/24/30265967rewritten
131.196.40.x/24/29265967rewritten
131.196.40.x/24/28265967rewritten
131.196.40.x/24/27265967natblock
131.196.40.x/24/26265967rewritten
131.196.40.x/24/25265967natblock
131.196.40.x/24/24265967rewritten
131.196.41.x/24/23265967rewritten
131.196.42.x/24/22265967natblock
131.196.44.x/24/21265904rewritten
131.196.32.x/24/20265766rewritten
131.196.56.x/24/19265893rewritten
131.196.8.x/24/18265632rewritten
131.196.104.x/24/17265918rewritten
131.196.168.x/24/16265915rewritten
131.197.40.x/24/15UNROUTEDrewritten
131.198.40.x/24/141341rewritten
131.192.40.x/24/13UNROUTEDrewritten
131.204.40.x/24/126112rewritten
131.212.40.x/24/11217rewritten
131.228.40.x/24/10UNROUTEDrewritten
131.132.40.x/24/974rewritten
131.68.40.x/24/8138rewritten

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 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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