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Session Report

Summary:
Test run at: 2017-04-30 14:21:02 GMT
Client Prefix (v4): 139.5.105.x/24
Client AS (v4): 135054 (SIGNATURE)
IPv4 Probes: 91
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 (139.5.105.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
139.5.105.x/24/31135054natblock
139.5.105.x/24/30135054natblock
139.5.105.x/24/29135054rewritten
139.5.105.x/24/28135054rewritten
139.5.105.x/24/27135054rewritten
139.5.105.x/24/26135054rewritten
139.5.105.x/24/25135054rewritten
139.5.105.x/24/24135054rewritten
139.5.104.x/24/23135054rewritten
139.5.107.x/24/22135054rewritten
139.5.109.x/24/21135391rewritten
139.5.97.x/24/2055879rewritten
139.5.121.x/24/19UNROUTEDrewritten
139.5.73.x/24/1817501rewritten
139.5.41.x/24/17UNROUTEDrewritten
139.5.233.x/24/16135221rewritten
139.4.105.x/24/15702rewritten
139.7.105.x/24/143209rewritten
139.1.105.x/24/13UNROUTEDrewritten
139.13.105.x/24/12680rewritten
139.21.105.x/24/11UNROUTEDrewritten
139.37.105.x/24/10UNROUTEDrewritten
139.69.105.x/24/93549rewritten
139.133.105.x/24/8786rewritten

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.
rewrittenThe source address of the probe packets we received differs from the spoofed address. It appears that an intermediate device is rewriting your packet headers.

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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