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Session Report

Summary:
Test run at: 2016-10-20 14:47:03 GMT
Client Prefix (v4): 199.227.111.x/24
Client AS (v4): 4323 (CENTURYLINK-LEGACY-TWTC)
IPv4 Probes: 105
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 unknown
Routable unknown
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 (199.227.111.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
199.227.111.x/24/314323natblock
199.227.111.x/24/304323natblock
199.227.111.x/24/294323natblock
199.227.111.x/24/284323natblock
199.227.111.x/24/274323natblock
199.227.111.x/24/264323natblock
199.227.111.x/24/254323natblock
199.227.111.x/24/244323natblock
199.227.110.x/24/234323natblock
199.227.109.x/24/224323natblock
199.227.107.x/24/214323natblock
199.227.103.x/24/204323natblock
199.227.127.x/24/194323natblock
199.227.79.x/24/184323natblock
199.227.47.x/24/174323natblock
199.227.239.x/24/164323natblock
199.226.111.x/24/152629natblock
199.225.111.x/24/14UNROUTEDnatblock
199.231.111.x/24/1354707natblock
199.235.111.x/24/1233105natblock
199.243.111.x/24/11577natblock
199.195.111.x/24/1022773natblock
199.163.111.x/24/9UNROUTEDnatblock
199.99.111.x/24/8174natblock

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.

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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