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Session Report

Summary:
Test run at: 2021-09-16 11:42:56 GMT
Client Prefix (v4): 137.194.155.x/24
Client AS (v4): 1712 (FR-RENATER-ENST)
IPv4 Probes: 66
Client Prefix (v6): 2a04:8ec0:xx::/40
Client AS (v6): 1712 (FR-RENATER-ENST)
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 blocked
Routable blocked
Largest spoofable neighbor prefix length /18
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.
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 (137.194.155.x/24) can spoof 16383 neighboring addresses (within your /18 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
137.194.155.x/24/311712yes
137.194.155.x/24/301712yes
137.194.155.x/24/291712yes
137.194.155.x/24/281712yes
137.194.155.x/24/271712yes
137.194.155.x/24/261712yes
137.194.155.x/24/251712yes
137.194.155.x/24/241712yes
137.194.154.x/24/231712yes
137.194.153.x/24/221712yes
137.194.159.x/24/211712yes
137.194.147.x/24/201712yes
137.194.139.x/24/191712no
137.194.187.x/24/181712yes
137.194.219.x/24/171712no
137.194.27.x/24/161712no
137.195.155.x/24/15786no
137.192.155.x/24/145006no
137.198.155.x/24/1314655no
137.202.155.x/24/1213541no
137.210.155.x/24/11749no
137.226.155.x/24/1047610no
137.130.155.x/24/9UNROUTEDno
137.66.155.x/24/8UNROUTEDno

Meaning of status in Received column:

noPackets spoofed from adjacent netblock were not received, probably due to blocking
yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)

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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