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Session Report

Summary:
Test run at: 2023-07-21 11:10:53 GMT
Client Prefix (v4): 83.217.13.x/24
Client AS (v4): 51446 (KATTELECOMNET)
IPv4 Probes: 60
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 rewritten
Routable rewritten
Largest spoofable neighbor prefix length /31
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 (83.217.13.x/24) can spoof 1 neighboring addresses (within your /31 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
83.217.13.x/24/3151446yes
83.217.13.x/24/3051446rewritten
83.217.13.x/24/2951446rewritten
83.217.13.x/24/2851446rewritten
83.217.13.x/24/2751446rewritten
83.217.13.x/24/2651446rewritten
83.217.13.x/24/2551446rewritten
83.217.13.x/24/2451446rewritten
83.217.12.x/24/2351446rewritten
83.217.15.x/24/2248642rewritten
83.217.9.x/24/21199669rewritten
83.217.5.x/24/20206766rewritten
83.217.29.x/24/1944724rewritten
83.217.45.x/24/18UNROUTEDrewritten
83.217.77.x/24/1734762rewritten
83.217.141.x/24/166848rewritten
83.216.13.x/24/1551473rewritten
83.219.13.x/24/1412389rewritten
83.221.13.x/24/1334150rewritten
83.209.13.x/24/1229518rewritten
83.201.13.x/24/113215rewritten
83.249.13.x/24/101257rewritten
83.153.13.x/24/912322rewritten
83.89.13.x/24/83292rewritten

Meaning of status in Received column:

yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)
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 1 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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