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Session Report

Summary:
Test run at: 2021-02-22 19:11:55 GMT
Client Prefix (v4): 209.58.142.x/24
Client AS (v4): 7203 (LEASEWEB-USA-SFO-12)
IPv4 Probes: 66
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 unknown
Routable unknown
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 (209.58.142.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
209.58.142.x/24/317203sendto
209.58.142.x/24/307203sendto
209.58.142.x/24/297203sendto
209.58.142.x/24/287203sendto
209.58.142.x/24/277203sendto
209.58.142.x/24/267203sendto
209.58.142.x/24/257203sendto
209.58.142.x/24/247203sendto
209.58.143.x/24/237203sendto
209.58.140.x/24/227203sendto
209.58.138.x/24/217203sendto
209.58.134.x/24/207203sendto
209.58.158.x/24/19394380sendto
209.58.174.x/24/1859253sendto
209.58.206.x/24/1714265sendto
209.58.14.x/24/166453sendto
209.59.142.x/24/1532244sendto
209.56.142.x/24/146122sendto
209.62.142.x/24/13UNROUTEDsendto
209.50.142.x/24/123737sendto
209.42.142.x/24/1111776sendto
209.26.142.x/24/102379sendto
209.122.142.x/24/96079sendto
209.186.142.x/24/87018sendto

Meaning of status in Received column:

sendtoThe spoofer client was unable to send spoofed headers due to an operating system restriction.

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.
Last Modified