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Session Report

Summary:
Test run at: 2021-12-29 10:14:36 GMT
Client Prefix (v4): 83.174.144.x/24
Client AS (v4): 48544 (TECNOADSL-AS)
IPv4 Probes: 63
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 (83.174.144.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
83.174.144.x/24/3148544rewritten
83.174.144.x/24/3048544rewritten
83.174.144.x/24/2948544rewritten
83.174.144.x/24/2848544rewritten
83.174.144.x/24/2748544rewritten
83.174.144.x/24/2648544rewritten
83.174.144.x/24/2548544rewritten
83.174.144.x/24/2448544rewritten
83.174.145.x/24/2348544rewritten
83.174.146.x/24/2248544rewritten
83.174.148.x/24/21197580rewritten
83.174.152.x/24/20197580rewritten
83.174.128.x/24/1957795rewritten
83.174.176.x/24/185466rewritten
83.174.208.x/24/1728812rewritten
83.174.16.x/24/1612353rewritten
83.175.144.x/24/1534525rewritten
83.172.144.x/24/1425459rewritten
83.170.144.x/24/1322351rewritten
83.166.144.x/24/1229222rewritten
83.190.144.x/24/111257rewritten
83.142.144.x/24/1034177rewritten
83.238.144.x/24/912741rewritten
83.46.144.x/24/83352rewritten

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.

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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