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Session Report

Summary:
Test run at: 2023-10-19 11:19:50 GMT
Client Prefix (v4): 213.55.240.x/24
Client AS (v4): 15796 (SALT-CH)
IPv4 Probes: 69
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 rewritten
Routable rewritten
Largest spoofable neighbor prefix length none
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 (213.55.240.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
213.55.240.x/24/3115796sendto
213.55.240.x/24/3015796sendto
213.55.240.x/24/2915796sendto
213.55.240.x/24/2815796sendto
213.55.240.x/24/2715796sendto
213.55.240.x/24/2615796sendto
213.55.240.x/24/2515796sendto
213.55.240.x/24/2415796sendto
213.55.241.x/24/2315796sendto
213.55.242.x/24/2215796sendto
213.55.244.x/24/2115796rewritten
213.55.248.x/24/2015796sendto
213.55.224.x/24/1915796sendto
213.55.208.x/24/1815796sendto
213.55.176.x/24/1715796sendto
213.55.112.x/24/1624757sendto
213.54.240.x/24/15UNROUTEDsendto
213.53.240.x/24/14702sendto
213.51.240.x/24/1333915sendto
213.63.240.x/24/1212926sendto
213.39.240.x/24/116805sendto
213.23.240.x/24/103209sendto
213.119.240.x/24/96848sendto
213.183.240.x/24/8197460sendto

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.
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.
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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