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Session Report

Summary:
Test run at: 2020-04-26 22:48:10 GMT
Client Prefix (v4): 109.254.56.x/24
Client AS (v4): 20590 (DEC-AS)
IPv4 Probes: 75
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 (109.254.56.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
109.254.56.x/24/3120590rewritten
109.254.56.x/24/3020590rewritten
109.254.56.x/24/2920590rewritten
109.254.56.x/24/2820590rewritten
109.254.56.x/24/2720590rewritten
109.254.56.x/24/2620590natblock
109.254.56.x/24/2520590rewritten
109.254.56.x/24/2420590rewritten
109.254.57.x/24/2320590rewritten
109.254.58.x/24/2220590rewritten
109.254.60.x/24/2120590rewritten
109.254.48.x/24/2020590rewritten
109.254.40.x/24/1920590rewritten
109.254.24.x/24/1820590rewritten
109.254.120.x/24/1720590rewritten
109.254.184.x/24/1620590rewritten
109.255.56.x/24/156830rewritten
109.252.56.x/24/1425513rewritten
109.250.56.x/24/138881rewritten
109.246.56.x/24/1225178rewritten
109.238.56.x/24/1112617rewritten
109.222.56.x/24/103215rewritten
109.190.56.x/24/935540rewritten
109.126.56.x/24/842038rewritten

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.
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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