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Session Report

Summary:
Test run at: 2016-12-26 20:47:01 GMT
Client Prefix (v4): 201.220.156.x/24
Client AS (v4): 52420
IPv4 Probes: 90
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 blocked
Routable blocked
Largest spoofable neighbor prefix length /20
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.
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 (201.220.156.x/24) can spoof 4095 neighboring addresses (within your /20 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
201.220.156.x/24/3152420yes
201.220.156.x/24/3052420yes
201.220.156.x/24/2952420yes
201.220.156.x/24/2852420yes
201.220.156.x/24/2752420yes
201.220.156.x/24/2652420yes
201.220.156.x/24/2552420yes
201.220.156.x/24/2452420yes
201.220.157.x/24/2352420yes
201.220.158.x/24/2252420yes
201.220.152.x/24/2152420yes
201.220.148.x/24/2052420yes
201.220.140.x/24/1927884natblock
201.220.188.x/24/1827818natblock
201.220.220.x/24/1727725natblock
201.220.28.x/24/16262151natblock
201.221.156.x/24/1522368natblock
201.222.156.x/24/147418natblock
201.216.156.x/24/1314754natblock
201.212.156.x/24/1210481natblock
201.204.156.x/24/1111830natblock
201.252.156.x/24/107303natblock
201.156.156.x/24/96503natblock
201.92.156.x/24/827699natblock

Meaning of status in Received column:

yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)
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 able to spoof routable, non-adjacent source addresses through the first 2 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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