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Session Report

Summary:
Test run at: 2017-01-26 09:35:28 GMT
Client Prefix (v4): 27.52.234.x/24
Client AS (v4): 9674 (FET-TW)
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 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.
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 (27.52.234.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
27.52.234.x/24/319674natblock
27.52.234.x/24/309674natblock
27.52.234.x/24/299674natblock
27.52.234.x/24/289674natblock
27.52.234.x/24/279674natblock
27.52.234.x/24/269674natblock
27.52.234.x/24/259674natblock
27.52.234.x/24/249674natblock
27.52.235.x/24/239674natblock
27.52.232.x/24/229674natblock
27.52.238.x/24/219674natblock
27.52.226.x/24/209674natblock
27.52.250.x/24/199674natblock
27.52.202.x/24/189674natblock
27.52.170.x/24/179674natblock
27.52.106.x/24/169674natblock
27.53.234.x/24/159674natblock
27.54.234.x/24/144134natblock
27.48.234.x/24/1323772natblock
27.60.234.x/24/1245609natblock
27.36.234.x/24/1117816natblock
27.20.234.x/24/104134natblock
27.116.234.x/24/917608natblock
27.180.234.x/24/89644natblock

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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