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Session Report

Summary:
Test run at: 2017-02-27 02:04:36 GMT
Client Prefix (v4): 203.143.158.x/24
Client AS (v4): 10120 (IBM-SG-AP)
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 (203.143.158.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
203.143.158.x/24/3110120natblock
203.143.158.x/24/3010120natblock
203.143.158.x/24/2910120natblock
203.143.158.x/24/2810120natblock
203.143.158.x/24/2710120natblock
203.143.158.x/24/2610120natblock
203.143.158.x/24/2510120natblock
203.143.158.x/24/2410120natblock
203.143.159.x/24/2310120natblock
203.143.156.x/24/22UNROUTEDnatblock
203.143.154.x/24/21UNROUTEDnatblock
203.143.150.x/24/20UNROUTEDnatblock
203.143.142.x/24/19UNROUTEDnatblock
203.143.190.x/24/18UNROUTEDnatblock
203.143.222.x/24/177543natblock
203.143.30.x/24/165087natblock
203.142.158.x/24/159443natblock
203.141.158.x/24/142514natblock
203.139.158.x/24/13UNROUTEDnatblock
203.135.158.x/24/1223881natblock
203.159.158.x/24/114621natblock
203.175.158.x/24/1023842natblock
203.207.158.x/24/917964natblock
203.15.158.x/24/8UNROUTEDnatblock

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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