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Session Report

Summary:
Test run at: 2023-05-22 07:55:14 GMT
Client Prefix (v4): 81.207.228.x/24
Client AS (v4): 1136 (KPN)
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 (81.207.228.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
81.207.228.x/24/311136rewritten
81.207.228.x/24/301136rewritten
81.207.228.x/24/291136rewritten
81.207.228.x/24/281136rewritten
81.207.228.x/24/271136rewritten
81.207.228.x/24/261136rewritten
81.207.228.x/24/251136rewritten
81.207.228.x/24/241136rewritten
81.207.229.x/24/231136rewritten
81.207.230.x/24/221136rewritten
81.207.224.x/24/211136rewritten
81.207.236.x/24/201136rewritten
81.207.244.x/24/191136rewritten
81.207.196.x/24/181136rewritten
81.207.164.x/24/171136rewritten
81.207.100.x/24/161136rewritten
81.206.228.x/24/151136rewritten
81.205.228.x/24/141136rewritten
81.203.228.x/24/136739rewritten
81.199.228.x/24/1212491rewritten
81.223.228.x/24/118412rewritten
81.239.228.x/24/103301rewritten
81.143.228.x/24/92856rewritten
81.79.228.x/24/85378rewritten

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 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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