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Session Report

Summary:
Test run at: 2023-03-21 06:06:20 GMT
Client Prefix (v4): 166.111.68.x/24
Client AS (v4): 4538 (ERX-CERNET-BKB)
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 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 (166.111.68.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
166.111.68.x/24/314538rewritten
166.111.68.x/24/304538rewritten
166.111.68.x/24/294538rewritten
166.111.68.x/24/284538rewritten
166.111.68.x/24/274538rewritten
166.111.68.x/24/264538rewritten
166.111.68.x/24/254538rewritten
166.111.68.x/24/244538rewritten
166.111.69.x/24/234538rewritten
166.111.70.x/24/224538rewritten
166.111.64.x/24/214538rewritten
166.111.76.x/24/204538rewritten
166.111.84.x/24/194538rewritten
166.111.100.x/24/184538rewritten
166.111.4.x/24/174538rewritten
166.111.196.x/24/164538rewritten
166.110.68.x/24/15UNROUTEDrewritten
166.109.68.x/24/1418481rewritten
166.107.68.x/24/1312054rewritten
166.103.68.x/24/12UNROUTEDrewritten
166.127.68.x/24/114604rewritten
166.79.68.x/24/10UNROUTEDrewritten
166.47.68.x/24/93371rewritten
166.239.68.x/24/822394rewritten

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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