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Session Report

Summary:
Test run at: 2021-11-02 18:11:23 GMT
Client Prefix (v4): 71.85.81.x/24
Client AS (v4): 16787 (CHARTER-16787-DC)
IPv4 Probes: 66
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 rewritten
Routable blocked
Largest spoofable neighbor prefix length /20

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 (71.85.81.x/24) can spoof 4095 neighboring addresses (within your /20 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
71.85.81.x/24/3116787yes
71.85.81.x/24/3016787yes
71.85.81.x/24/2916787yes
71.85.81.x/24/2816787yes
71.85.81.x/24/2716787yes
71.85.81.x/24/2616787yes
71.85.81.x/24/2516787yes
71.85.81.x/24/2416787yes
71.85.80.x/24/2316787yes
71.85.83.x/24/2216787yes
71.85.85.x/24/2116787yes
71.85.89.x/24/2016787yes
71.85.65.x/24/1920115natblock
71.85.113.x/24/1820115natblock
71.85.17.x/24/1720115natblock
71.85.209.x/24/1620115natblock
71.84.81.x/24/1520115natblock
71.87.81.x/24/1420115natblock
71.81.81.x/24/1320115natblock
71.93.81.x/24/1220115natblock
71.69.81.x/24/1111426natblock
71.117.81.x/24/10701natblock
71.21.81.x/24/9UNROUTEDnatblock
71.213.81.x/24/8209natblock

Meaning of status in Received column:

yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)
natblockSpoofed probe packets appear to be blocked by your local NAT or firewall rather than being rewritten with a public source address.

IPv4 Outbound Filtering Depth:

The tracefilter test found your host able to spoof routable, non-adjacent source addresses through the first 1 IP hop(s).
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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