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Session Report

Summary:
Test run at: 2017-02-14 13:46:32 GMT
Client Prefix (v4): 83.253.0.x/24
Client AS (v4): 39651 (TELE2-FIXED-SWEDEN)
IPv4 Probes: 90
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 (83.253.0.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
83.253.0.x/24/3139651rewritten
83.253.0.x/24/3039651rewritten
83.253.0.x/24/2939651rewritten
83.253.0.x/24/2839651rewritten
83.253.0.x/24/2739651rewritten
83.253.0.x/24/2639651rewritten
83.253.0.x/24/2539651rewritten
83.253.0.x/24/2439651rewritten
83.253.1.x/24/2339651rewritten
83.253.2.x/24/2239651rewritten
83.253.4.x/24/2139651rewritten
83.253.8.x/24/2039651rewritten
83.253.16.x/24/1939651rewritten
83.253.32.x/24/1839651rewritten
83.253.64.x/24/1739651rewritten
83.253.128.x/24/1639651rewritten
83.252.0.x/24/1539651rewritten
83.255.0.x/24/1439651rewritten
83.249.0.x/24/1339651rewritten
83.245.0.x/24/123257rewritten
83.237.0.x/24/118359rewritten
83.221.0.x/24/1031302rewritten
83.189.0.x/24/91257rewritten
83.125.0.x/24/813237rewritten

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 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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