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Session Report

Summary:
Test run at: 2022-06-30 10:49:15 GMT
Client Prefix (v4): 72.255.10.x/24
Client AS (v4): 9541 (CYBERNET-AP)
IPv4 Probes: 60
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 (72.255.10.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
72.255.10.x/24/319541rewritten
72.255.10.x/24/309541rewritten
72.255.10.x/24/299541natblock
72.255.10.x/24/289541rewritten
72.255.10.x/24/279541rewritten
72.255.10.x/24/269541natblock
72.255.10.x/24/259541natblock
72.255.10.x/24/249541rewritten
72.255.11.x/24/239541rewritten
72.255.8.x/24/229541rewritten
72.255.14.x/24/219541rewritten
72.255.2.x/24/209541rewritten
72.255.26.x/24/199541rewritten
72.255.42.x/24/189541rewritten
72.255.74.x/24/1730036rewritten
72.255.138.x/24/1640933rewritten
72.254.10.x/24/15UNROUTEDrewritten
72.253.10.x/24/1436149rewritten
72.251.10.x/24/137459rewritten
72.247.10.x/24/1220940rewritten
72.239.10.x/24/1133363natblock
72.223.10.x/24/1022773rewritten
72.191.10.x/24/911427rewritten
72.127.10.x/24/86167rewritten

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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