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Session Report

Summary:
Test run at: 2020-05-29 19:58:00 GMT
Client Prefix (v4): 199.233.61.x/24
Client AS (v4): 54417 (STIMULUS-TECHNOLOGIES)
IPv4 Probes: 75
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 (199.233.61.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
199.233.61.x/24/3154417natblock
199.233.61.x/24/3054417natblock
199.233.61.x/24/2954417rewritten
199.233.61.x/24/2854417rewritten
199.233.61.x/24/2754417rewritten
199.233.61.x/24/2654417rewritten
199.233.61.x/24/2554417rewritten
199.233.61.x/24/2454417rewritten
199.233.60.x/24/2354417rewritten
199.233.63.x/24/2254417rewritten
199.233.57.x/24/21UNROUTEDrewritten
199.233.53.x/24/20UNROUTEDrewritten
199.233.45.x/24/192381rewritten
199.233.29.x/24/1840633rewritten
199.233.125.x/24/1730498rewritten
199.233.189.x/24/16UNROUTEDrewritten
199.232.61.x/24/1554113rewritten
199.235.61.x/24/1433105rewritten
199.237.61.x/24/1313649rewritten
199.225.61.x/24/12UNROUTEDrewritten
199.249.61.x/24/11UNROUTEDrewritten
199.201.61.x/24/10UNROUTEDrewritten
199.169.61.x/24/9UNROUTEDrewritten
199.105.61.x/24/87018rewritten

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 able to spoof routable, non-adjacent source addresses through the first 1 IP hop(s).
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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