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Session Report

Summary:
Test run at: 2021-12-30 22:01:05 GMT
Client Prefix (v4): 194.105.155.x/24
Client AS (v4): 42004 (ULGRP-AS)
IPv4 Probes: 63
Client Prefix (v6): 2a00:19d8:xx::/40
Client AS (v6): 42004 (ULGRP-AS)
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 rewritten
Routable rewritten
Largest spoofable neighbor prefix length none

Meaning of result status in column:

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 (194.105.155.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
194.105.155.x/24/3142004rewritten
194.105.155.x/24/3042004rewritten
194.105.155.x/24/2942004rewritten
194.105.155.x/24/2842004rewritten
194.105.155.x/24/2742004rewritten
194.105.155.x/24/2642004rewritten
194.105.155.x/24/2542004rewritten
194.105.155.x/24/2442004rewritten
194.105.154.x/24/2342004rewritten
194.105.153.x/24/2241653rewritten
194.105.159.x/24/2126548rewritten
194.105.147.x/24/208893rewritten
194.105.139.x/24/1915879rewritten
194.105.187.x/24/188902rewritten
194.105.219.x/24/176820rewritten
194.105.27.x/24/1612302rewritten
194.104.155.x/24/158888rewritten
194.107.155.x/24/148447rewritten
194.109.155.x/24/133265rewritten
194.97.155.x/24/125539rewritten
194.121.155.x/24/111136rewritten
194.73.155.x/24/102856rewritten
194.41.155.x/24/912511rewritten
194.233.155.x/24/81239rewritten

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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