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Session Report

Summary:
Test run at: 2022-04-24 07:33:09 GMT
Client Prefix (v4): 87.123.242.x/24
Client AS (v4): 8881 (VERSATEL)
IPv4 Probes: 60
Client Prefix (v6): 2001:9e8:22xx::/40
Client AS (v6): 8881 (VERSATEL)
IPv6 Probes: 56
Outbound spoofing summary (from the client to our server)
Source address type IPv4IPv6
Private - RFC1918 or ULA unknownunknown
Routable unknownunknown
Largest spoofable neighbor prefix length nonenone
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 (87.123.242.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
87.123.242.x/24/318881sendto
87.123.242.x/24/308881sendto
87.123.242.x/24/298881sendto
87.123.242.x/24/288881sendto
87.123.242.x/24/278881sendto
87.123.242.x/24/268881sendto
87.123.242.x/24/258881sendto
87.123.242.x/24/248881sendto
87.123.243.x/24/238881sendto
87.123.240.x/24/228881sendto
87.123.246.x/24/218881sendto
87.123.250.x/24/208881sendto
87.123.226.x/24/198881sendto
87.123.210.x/24/188881sendto
87.123.178.x/24/178881sendto
87.123.114.x/24/168881sendto
87.122.242.x/24/158881sendto
87.121.242.x/24/14UNROUTEDsendto
87.127.242.x/24/138468sendto
87.115.242.x/24/126871sendto
87.107.242.x/24/1158224sendto
87.91.242.x/24/105410sendto
87.59.242.x/24/93292sendto
87.251.242.x/24/88374natblock

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.
sendtoThe spoofer client was unable to send spoofed headers due to an operating system restriction.

IPv4 Outbound Filtering Depth:

The tracefilter test found your host unable to spoof routable, non-adjacent source addresses through even the first IP hop.
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
2001:9e8:22xx::/40/1208881sendto
2001:9e8:22xx::/40/1128881sendto
2001:9e8:22xx::/40/1048881sendto
2001:9e8:22xx::/40/968881sendto
2001:9e8:22xx::/40/888881sendto
2001:9e8:22xx::/40/808881sendto
2001:9e8:22xx::/40/728881sendto
2001:9e8:22xx::/40/648881sendto
2001:9e8:22xx::/40/568881sendto
2001:9e8:22xx::/40/488881sendto
2001:9e8:22xx::/40/408881sendto
2001:9e8:a2xx::/40/328881sendto
2001:968:22xx::/40/2424875sendto
2001:89e8:22xx::/40/161221sendto

Meaning of status in Received column:

sendtoThe spoofer client was unable to send spoofed headers due to an operating system restriction.
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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