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Session Report

Summary:
Test run at: 2018-05-01 12:23:32 GMT
Client Prefix (v4): 196.200.208.x/24
Client AS (v4): 37095
IPv4 Probes: 99
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 blocked
Routable blocked
Largest spoofable neighbor prefix length /21
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 (196.200.208.x/24) can spoof 2047 neighboring addresses (within your /21 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
196.200.208.x/24/3137095yes
196.200.208.x/24/3037095yes
196.200.208.x/24/2937095yes
196.200.208.x/24/2837095yes
196.200.208.x/24/2737095yes
196.200.208.x/24/2637095yes
196.200.208.x/24/2537095yes
196.200.208.x/24/2437095yes
196.200.209.x/24/2337095yes
196.200.210.x/24/2237095yes
196.200.212.x/24/2137095yes
196.200.216.x/24/2037095natblock
196.200.192.x/24/19UNROUTEDnatblock
196.200.240.x/24/1816206natblock
196.200.144.x/24/1730983natblock
196.200.80.x/24/1630985natblock
196.201.208.x/24/1533771natblock
196.202.208.x/24/1412455natblock
196.204.208.x/24/1324835natblock
196.192.208.x/24/12UNROUTEDnatblock
196.216.208.x/24/1137495natblock
196.232.208.x/24/1037492natblock
196.136.208.x/24/936935natblock
196.72.208.x/24/86713natblock

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 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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