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Session Report

Summary:
Test run at: 2020-05-27 15:44:20 GMT
Client Prefix (v4): 138.121.135.x/24
Client AS (v4): 264300
IPv4 Probes: 75
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 (138.121.135.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
138.121.135.x/24/31264300natblock
138.121.135.x/24/30264300natblock
138.121.135.x/24/29264300natblock
138.121.135.x/24/28264300natblock
138.121.135.x/24/27264300natblock
138.121.135.x/24/26264300natblock
138.121.135.x/24/25264300natblock
138.121.135.x/24/24264300natblock
138.121.134.x/24/23264300natblock
138.121.133.x/24/22264300natblock
138.121.131.x/24/21264294natblock
138.121.143.x/24/2028317natblock
138.121.151.x/24/19264298natblock
138.121.167.x/24/18UNROUTEDnatblock
138.121.199.x/24/17264301natblock
138.121.7.x/24/1661499natblock
138.120.135.x/24/158983natblock
138.123.135.x/24/1446887natblock
138.125.135.x/24/13UNROUTEDnatblock
138.113.135.x/24/12UNROUTEDnatblock
138.105.135.x/24/11UNROUTEDnatblock
138.89.135.x/24/10701natblock
138.57.135.x/24/9UNROUTEDnatblock
138.249.135.x/24/8UNROUTEDnatblock

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 able to spoof routable, non-adjacent source addresses through the first 1 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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