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Session Report

Summary:
Test run at: 2024-03-13 12:25:05 GMT
Client Prefix (v4): 137.194.252.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)
IPv6 Probes: 56
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA blockedunknown
Routable blockedunknown
Largest spoofable neighbor prefix length /17none
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 (137.194.252.x/24) can spoof 32767 neighboring addresses (within your /17 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
137.194.252.x/24/311712no
137.194.252.x/24/301712no
137.194.252.x/24/291712no
137.194.252.x/24/281712no
137.194.252.x/24/271712no
137.194.252.x/24/261712no
137.194.252.x/24/251712no
137.194.252.x/24/241712no
137.194.253.x/24/231712no
137.194.254.x/24/221712no
137.194.248.x/24/211712no
137.194.244.x/24/201712no
137.194.236.x/24/191712no
137.194.220.x/24/181712no
137.194.188.x/24/171712yes
137.194.124.x/24/161712no
137.195.252.x/24/15786no
137.192.252.x/24/145006no
137.198.252.x/24/1322773no
137.202.252.x/24/1213541no
137.210.252.x/24/11749no
137.226.252.x/24/1047610no
137.130.252.x/24/9749no
137.66.252.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).
IPv6 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.

  

  
IPv6 Adjacent Netblock Testing:
Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
2a04:8ec0:xx::/40/1201712no
2a04:8ec0:xx::/40/1121712no
2a04:8ec0:xx::/40/1041712no
2a04:8ec0:xx::/40/961712no
2a04:8ec0:xx::/40/881712no
2a04:8ec0:xx::/40/801712no
2a04:8ec0:xx::/40/721712no
2a04:8ec0:xx::/40/641712no
2a04:8ec0:xx::/40/561712no
2a04:8ec0:xx::/40/481712no
2a04:8ec0:xx::/40/40UNROUTEDno
2a04:8ec0:80xx::/40/32UNROUTEDno
2a04:8e40:xx::/40/24199927no
2a04:ec0:xx::/40/16UNROUTEDno

Meaning of status in Received column:

noPackets spoofed from adjacent netblock were not received, probably due to blocking
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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