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Session Report

Summary:
Test run at: 2022-02-09 04:01:47 GMT
Client Prefix (v4): 134.238.32.x/24
Client AS (v4): 396982 (GOOGLE-PRIVATE-CLOUD)
IPv4 Probes: 63
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 (134.238.32.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
134.238.32.x/24/31396982natblock
134.238.32.x/24/30396982natblock
134.238.32.x/24/29396982natblock
134.238.32.x/24/28396982natblock
134.238.32.x/24/27396982natblock
134.238.32.x/24/26396982natblock
134.238.32.x/24/25396982natblock
134.238.32.x/24/24396982natblock
134.238.33.x/24/23396982natblock
134.238.34.x/24/22396982natblock
134.238.36.x/24/21396982natblock
134.238.40.x/24/20396982natblock
134.238.48.x/24/19396982natblock
134.238.0.x/24/18396982natblock
134.238.96.x/24/17396982natblock
134.238.160.x/24/16396982natblock
134.239.32.x/24/15UNROUTEDnatblock
134.236.32.x/24/14131090natblock
134.234.32.x/24/131586natblock
134.230.32.x/24/12UNROUTEDnatblock
134.254.32.x/24/11749natblock
134.206.32.x/24/102200natblock
134.174.32.x/24/940127natblock
134.110.32.x/24/8680natblock

Meaning of status in Received column:

natblockSpoofed probe packets appear to be blocked by your local NAT or firewall rather than being rewritten with a public source address.

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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