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Session Report

Summary:
Test run at: 2016-11-29 21:30:21 GMT
Client Prefix (v4): 200.2.133.x/24
Client AS (v4): 27759
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 (200.2.133.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
200.2.133.x/24/3127759natblock
200.2.133.x/24/3027759rewritten
200.2.133.x/24/2927759rewritten
200.2.133.x/24/2827759rewritten
200.2.133.x/24/2727759rewritten
200.2.133.x/24/2627759rewritten
200.2.133.x/24/2527759rewritten
200.2.133.x/24/2427759rewritten
200.2.132.x/24/2327759rewritten
200.2.135.x/24/2227759rewritten
200.2.129.x/24/2127759rewritten
200.2.141.x/24/2027759rewritten
200.2.149.x/24/1927759rewritten
200.2.165.x/24/1827775rewritten
200.2.197.x/24/1710778rewritten
200.2.5.x/24/1627676rewritten
200.3.133.x/24/15UNROUTEDrewritten
200.0.133.x/24/14UNROUTEDrewritten
200.6.133.x/24/13264314rewritten
200.10.133.x/24/1261934rewritten
200.18.133.x/24/111916rewritten
200.34.133.x/24/10UNROUTEDrewritten
200.66.133.x/24/98151rewritten
200.130.133.x/24/81916rewritten

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.
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 14 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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