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Session Report

Summary:
Test run at: 2019-12-11 11:16:07 GMT
Client Prefix (v4): 72.255.20.x/24
Client AS (v4): 9541 (CYBERNET-AP)
IPv4 Probes: 75
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 (72.255.20.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
72.255.20.x/24/319541natblock
72.255.20.x/24/309541natblock
72.255.20.x/24/299541natblock
72.255.20.x/24/289541natblock
72.255.20.x/24/279541natblock
72.255.20.x/24/269541natblock
72.255.20.x/24/259541natblock
72.255.20.x/24/249541natblock
72.255.21.x/24/23UNROUTEDnatblock
72.255.22.x/24/229541natblock
72.255.16.x/24/219541natblock
72.255.28.x/24/209541natblock
72.255.4.x/24/199541natblock
72.255.52.x/24/189541natblock
72.255.84.x/24/1730036natblock
72.255.148.x/24/1640933natblock
72.254.20.x/24/15UNROUTEDnatblock
72.253.20.x/24/1436149natblock
72.251.20.x/24/134581natblock
72.247.20.x/24/1216625natblock
72.239.20.x/24/1133363natblock
72.223.20.x/24/1022773natblock
72.191.20.x/24/911427natblock
72.127.20.x/24/86167natblock

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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