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Session Report

Summary:
Test run at: 2017-05-17 21:34:44 GMT
Client Prefix (v4): 81.243.32.x/24
Client AS (v4): 5432 (PROXIMUS-ISP-AS)
IPv4 Probes: 117
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 (81.243.32.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
81.243.32.x/24/315432rewritten
81.243.32.x/24/305432rewritten
81.243.32.x/24/295432rewritten
81.243.32.x/24/285432rewritten
81.243.32.x/24/275432rewritten
81.243.32.x/24/265432rewritten
81.243.32.x/24/255432rewritten
81.243.32.x/24/245432rewritten
81.243.33.x/24/235432rewritten
81.243.34.x/24/225432rewritten
81.243.36.x/24/215432rewritten
81.243.40.x/24/205432rewritten
81.243.48.x/24/195432rewritten
81.243.0.x/24/185432rewritten
81.243.96.x/24/175432rewritten
81.243.160.x/24/165432rewritten
81.242.32.x/24/155432rewritten
81.241.32.x/24/145432rewritten
81.247.32.x/24/135432rewritten
81.251.32.x/24/123215rewritten
81.227.32.x/24/113301rewritten
81.211.32.x/24/103216rewritten
81.179.32.x/24/99105rewritten
81.115.32.x/24/820959rewritten

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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