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Session Report

Summary:
Test run at: 2021-07-24 12:24:46 GMT
Client Prefix (v4): 197.221.183.x/24
Client AS (v4): 37356 (Huge-Networks)
IPv4 Probes: 66
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 rewritten
Routable received
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 (197.221.183.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
197.221.183.x/24/3137356rewritten
197.221.183.x/24/3037356rewritten
197.221.183.x/24/2937356rewritten
197.221.183.x/24/2837356rewritten
197.221.183.x/24/2737356rewritten
197.221.183.x/24/2637356rewritten
197.221.183.x/24/2537356rewritten
197.221.183.x/24/2437356rewritten
197.221.182.x/24/2337356rewritten
197.221.181.x/24/2237356rewritten
197.221.179.x/24/2137356rewritten
197.221.191.x/24/2037356rewritten
197.221.167.x/24/1937356rewritten
197.221.151.x/24/1836977rewritten
197.221.247.x/24/1737204rewritten
197.221.55.x/24/1637153rewritten
197.220.183.x/24/1537341rewritten
197.223.183.x/24/1437069rewritten
197.217.183.x/24/1311259rewritten
197.213.183.x/24/1237287rewritten
197.205.183.x/24/1136947rewritten
197.253.183.x/24/1036925rewritten
197.157.183.x/24/9327707rewritten
197.93.183.x/24/810474rewritten

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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