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Session Report

Summary:
Test run at: 2024-01-17 02:01:50 GMT
Client Prefix (v4): 111.172.4.x/24
Client AS (v4): 4134 (CHINANET-BACKBONE)
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 (111.172.4.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
111.172.4.x/24/314134rewritten
111.172.4.x/24/304134rewritten
111.172.4.x/24/294134rewritten
111.172.4.x/24/284134rewritten
111.172.4.x/24/274134rewritten
111.172.4.x/24/264134rewritten
111.172.4.x/24/254134rewritten
111.172.4.x/24/244134rewritten
111.172.5.x/24/234134rewritten
111.172.6.x/24/224134rewritten
111.172.0.x/24/2158563rewritten
111.172.12.x/24/204134rewritten
111.172.20.x/24/194134rewritten
111.172.36.x/24/184134rewritten
111.172.68.x/24/174134rewritten
111.172.132.x/24/164134rewritten
111.173.4.x/24/154134rewritten
111.174.4.x/24/14136194rewritten
111.168.4.x/24/132518rewritten
111.164.4.x/24/124837rewritten
111.188.4.x/24/1117676rewritten
111.140.4.x/24/109394rewritten
111.236.4.x/24/92516rewritten
111.44.4.x/24/89808rewritten

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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