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Session Report

Summary:
Test run at: 2020-07-05 13:55:02 GMT
Client Prefix (v4): 131.255.120.x/24
Client AS (v4): 264479
IPv4 Probes: 75
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 rewritten
Routable received
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 (131.255.120.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
131.255.120.x/24/31264479rewritten
131.255.120.x/24/30264479rewritten
131.255.120.x/24/29264479rewritten
131.255.120.x/24/28264479rewritten
131.255.120.x/24/27264479natblock
131.255.120.x/24/26264479rewritten
131.255.120.x/24/25264479rewritten
131.255.120.x/24/24264479rewritten
131.255.121.x/24/23264479rewritten
131.255.122.x/24/22264479rewritten
131.255.124.x/24/21264480rewritten
131.255.112.x/24/20264487rewritten
131.255.104.x/24/198053rewritten
131.255.88.x/24/18264483rewritten
131.255.56.x/24/17UNROUTEDrewritten
131.255.248.x/24/16263712rewritten
131.254.120.x/24/151938rewritten
131.253.120.x/24/148070rewritten
131.251.120.x/24/13786rewritten
131.247.120.x/24/125661rewritten
131.239.120.x/24/1114985rewritten
131.223.120.x/24/10UNROUTEDrewritten
131.191.120.x/24/914677rewritten
131.127.120.x/24/8UNROUTEDrewritten

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 able to spoof routable, non-adjacent source addresses through the first 10 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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