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Session Report

Summary:
Test run at: 2017-02-24 17:19:29 GMT
Client Prefix (v4): 49.77.241.x/24
Client AS (v4): 4134 (CHINANET-BACKBONE)
IPv4 Probes: 98
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 (49.77.241.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
49.77.241.x/24/314134natblock
49.77.241.x/24/304134natblock
49.77.241.x/24/294134natblock
49.77.241.x/24/284134natblock
49.77.241.x/24/274134natblock
49.77.241.x/24/264134natblock
49.77.241.x/24/254134natblock
49.77.241.x/24/244134natblock
49.77.240.x/24/234134natblock
49.77.243.x/24/224134natblock
49.77.245.x/24/214134natblock
49.77.249.x/24/204134natblock
49.77.225.x/24/194134natblock
49.77.209.x/24/184134natblock
49.77.177.x/24/174134natblock
49.77.113.x/24/164134natblock
49.76.241.x/24/154134natblock
49.79.241.x/24/144134natblock
49.73.241.x/24/134134natblock
49.69.241.x/24/124134natblock
49.93.241.x/24/114134natblock
49.109.241.x/24/109605natblock
49.13.241.x/24/9UNROUTEDnatblock
49.205.241.x/24/824309natblock

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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