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Session Report

Summary:
Test run at: 2023-10-19 18:01:44 GMT
Client Prefix (v4): 167.250.74.x/24
Client AS (v4): 265197
IPv4 Probes: 69
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 rewritten
Routable received
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 (167.250.74.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
167.250.74.x/24/31265197rewritten
167.250.74.x/24/30265197rewritten
167.250.74.x/24/29265197rewritten
167.250.74.x/24/28265197rewritten
167.250.74.x/24/27265197rewritten
167.250.74.x/24/26265197rewritten
167.250.74.x/24/25265197rewritten
167.250.74.x/24/24265197rewritten
167.250.75.x/24/23265197rewritten
167.250.72.x/24/22265197rewritten
167.250.78.x/24/21265503rewritten
167.250.66.x/24/20265204rewritten
167.250.90.x/24/19262715rewritten
167.250.106.x/24/18265213rewritten
167.250.10.x/24/17262785rewritten
167.250.202.x/24/16265226rewritten
167.251.74.x/24/1514946rewritten
167.248.74.x/24/1415108rewritten
167.254.74.x/24/13UNROUTEDrewritten
167.242.74.x/24/1230356rewritten
167.234.74.x/24/113525rewritten
167.218.74.x/24/103136rewritten
167.186.74.x/24/98075rewritten
167.122.74.x/24/8UNROUTEDrewritten

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 10 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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