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Session Report

Summary:
Test run at: 2020-04-25 02:46:54 GMT
Client Prefix (v4): 137.164.77.x/24
Client AS (v4): 2152 (CSUNET-NW)
IPv4 Probes: 75
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 unknown
Routable unknown
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 (137.164.77.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
137.164.77.x/24/312152natblock
137.164.77.x/24/302152natblock
137.164.77.x/24/292152natblock
137.164.77.x/24/282152natblock
137.164.77.x/24/272152natblock
137.164.77.x/24/262152natblock
137.164.77.x/24/252152natblock
137.164.77.x/24/242152natblock
137.164.76.x/24/232152natblock
137.164.79.x/24/222152natblock
137.164.73.x/24/212152natblock
137.164.69.x/24/202152natblock
137.164.93.x/24/192152natblock
137.164.109.x/24/182152natblock
137.164.13.x/24/172152natblock
137.164.205.x/24/162152natblock
137.165.77.x/24/1511399natblock
137.166.77.x/24/1458877natblock
137.160.77.x/24/133549natblock
137.172.77.x/24/12UNROUTEDnatblock
137.180.77.x/24/1111003natblock
137.132.77.x/24/107472natblock
137.228.77.x/24/9127natblock
137.36.77.x/24/811351natblock

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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