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Session Report

Summary:
Test run at: 2020-01-03 15:08:50 GMT
Client Prefix (v4): 177.74.251.x/24
Client AS (v4): 263653
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 (177.74.251.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
177.74.251.x/24/31263653rewritten
177.74.251.x/24/30263653rewritten
177.74.251.x/24/29263653rewritten
177.74.251.x/24/28263653rewritten
177.74.251.x/24/27263653rewritten
177.74.251.x/24/26263653rewritten
177.74.251.x/24/25263653rewritten
177.74.251.x/24/24263653rewritten
177.74.250.x/24/23263653rewritten
177.74.249.x/24/22263653rewritten
177.74.255.x/24/21263653rewritten
177.74.243.x/24/20263653rewritten
177.74.235.x/24/19263652rewritten
177.74.219.x/24/1828343rewritten
177.74.187.x/24/1752783rewritten
177.74.123.x/24/1653184rewritten
177.75.251.x/24/15262601rewritten
177.72.251.x/24/1453039rewritten
177.78.251.x/24/1326599rewritten
177.66.251.x/24/1252660rewritten
177.90.251.x/24/1128571rewritten
177.106.251.x/24/1053006rewritten
177.10.251.x/24/9262274rewritten
177.202.251.x/24/88167rewritten

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 2 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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