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Session Report

Summary:
Test run at: 2021-07-27 15:14:55 GMT
Client Prefix (v4): 138.99.103.x/24
Client AS (v4): 263750
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 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 (138.99.103.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
138.99.103.x/24/31263750natblock
138.99.103.x/24/30263750natblock
138.99.103.x/24/29263750natblock
138.99.103.x/24/28263750natblock
138.99.103.x/24/27263750natblock
138.99.103.x/24/26263750natblock
138.99.103.x/24/25263750natblock
138.99.103.x/24/24263750natblock
138.99.102.x/24/23263750natblock
138.99.101.x/24/22263750natblock
138.99.99.x/24/21264171natblock
138.99.111.x/24/2052747natblock
138.99.119.x/24/1953233natblock
138.99.71.x/24/18264160natblock
138.99.39.x/24/17263740natblock
138.99.231.x/24/16UNROUTEDnatblock
138.98.103.x/24/15UNROUTEDnatblock
138.97.103.x/24/14264181natblock
138.103.103.x/24/137046natblock
138.107.103.x/24/122497natblock
138.115.103.x/24/11270natblock
138.67.103.x/24/1036704natblock
138.35.103.x/24/9UNROUTEDnatblock
138.227.103.x/24/8UNROUTEDnatblock

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.

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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