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Session Report

Summary:
Test run at: 2017-02-23 20:56:10 GMT
Client Prefix (v4): 145.129.139.x/24
Client AS (v4): 1136 (KPN)
IPv4 Probes: 104
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 (145.129.139.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
145.129.139.x/24/311136rewritten
145.129.139.x/24/301136rewritten
145.129.139.x/24/291136rewritten
145.129.139.x/24/281136rewritten
145.129.139.x/24/271136rewritten
145.129.139.x/24/261136rewritten
145.129.139.x/24/251136rewritten
145.129.139.x/24/241136rewritten
145.129.138.x/24/231136rewritten
145.129.137.x/24/221136rewritten
145.129.143.x/24/211136rewritten
145.129.131.x/24/201136rewritten
145.129.155.x/24/191136rewritten
145.129.171.x/24/181136rewritten
145.129.203.x/24/171136rewritten
145.129.11.x/24/161136rewritten
145.128.139.x/24/1528685rewritten
145.131.139.x/24/1428685rewritten
145.133.139.x/24/131136rewritten
145.137.139.x/24/121103rewritten
145.145.139.x/24/111103rewritten
145.161.139.x/24/101103rewritten
145.193.139.x/24/91101rewritten
145.1.139.x/24/81103rewritten

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 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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