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Session Report

Summary:
Test run at: 2017-06-23 00:06:07 GMT
Client Prefix (v4): 137.119.61.x/24
Client AS (v4): 22191 (WILKES-COMM)
IPv4 Probes: 118
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 rewritten
Routable rewritten
Largest spoofable neighbor prefix length none
Spoof status key
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 (137.119.61.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
137.119.61.x/24/3122191rewritten
137.119.61.x/24/3022191rewritten
137.119.61.x/24/2922191rewritten
137.119.61.x/24/2822191rewritten
137.119.61.x/24/2722191rewritten
137.119.61.x/24/2622191rewritten
137.119.61.x/24/2522191rewritten
137.119.61.x/24/2422191rewritten
137.119.60.x/24/2322191rewritten
137.119.63.x/24/2222191rewritten
137.119.57.x/24/2122191rewritten
137.119.53.x/24/2022191rewritten
137.119.45.x/24/1922191rewritten
137.119.29.x/24/18UNROUTEDrewritten
137.119.125.x/24/1740317rewritten
137.119.189.x/24/1621766rewritten
137.118.61.x/24/156250rewritten
137.117.61.x/24/148075rewritten
137.115.61.x/24/13UNROUTEDrewritten
137.127.61.x/24/12UNROUTEDrewritten
137.103.61.x/24/1112035rewritten
137.87.61.x/24/1014977rewritten
137.55.61.x/24/9UNROUTEDrewritten
137.247.61.x/24/8UNROUTEDrewritten

Meaning of status in Received column:

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 2 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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