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Session Report

Summary:
Test run at: 2022-07-25 11:53:41 GMT
Client Prefix (v4): 143.202.251.x/24
Client AS (v4): 264084
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 (143.202.251.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
143.202.251.x/24/31264084rewritten
143.202.251.x/24/30264084rewritten
143.202.251.x/24/29264084rewritten
143.202.251.x/24/28264084rewritten
143.202.251.x/24/27264084rewritten
143.202.251.x/24/26264084rewritten
143.202.251.x/24/25264084rewritten
143.202.251.x/24/24264084rewritten
143.202.250.x/24/23264084rewritten
143.202.249.x/24/22264084rewritten
143.202.255.x/24/21264609rewritten
143.202.243.x/24/20262293rewritten
143.202.235.x/24/19264082rewritten
143.202.219.x/24/18264074rewritten
143.202.187.x/24/17264076rewritten
143.202.123.x/24/16263543rewritten
143.203.251.x/24/15UNROUTEDrewritten
143.200.251.x/24/143128rewritten
143.206.251.x/24/1340503rewritten
143.194.251.x/24/121541rewritten
143.218.251.x/24/11UNROUTEDrewritten
143.234.251.x/24/10786rewritten
143.138.251.x/24/9747rewritten
143.74.251.x/24/8747rewritten

Meaning of status in Received column:

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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