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Session Report

Summary:
Test run at: 2022-07-18 18:11:33 GMT
Client Prefix (v4): 191.37.139.x/24
Client AS (v4): 263360
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 (191.37.139.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
191.37.139.x/24/31263360rewritten
191.37.139.x/24/30263360rewritten
191.37.139.x/24/29263360rewritten
191.37.139.x/24/28263360rewritten
191.37.139.x/24/27263360rewritten
191.37.139.x/24/26263360rewritten
191.37.139.x/24/25263360rewritten
191.37.139.x/24/24263360rewritten
191.37.138.x/24/23263360rewritten
191.37.137.x/24/22263360rewritten
191.37.143.x/24/21266387rewritten
191.37.131.x/24/20263359rewritten
191.37.155.x/24/19263362rewritten
191.37.171.x/24/18271023rewritten
191.37.203.x/24/17263371rewritten
191.37.11.x/24/16263348rewritten
191.36.139.x/24/15263335rewritten
191.39.139.x/24/144230rewritten
191.33.139.x/24/1318881rewritten
191.45.139.x/24/127738rewritten
191.53.139.x/24/1128202rewritten
191.5.139.x/24/10263536rewritten
191.101.139.x/24/961317rewritten
191.165.139.x/24/826615rewritten

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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