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Session Report

Summary:
Test run at: 2022-02-21 00:50:08 GMT
Client Prefix (v4): 58.77.157.x/24
Client AS (v4): 17858 (POWERVIS-AS-KR)
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 (58.77.157.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
58.77.157.x/24/3117858rewritten
58.77.157.x/24/3017858rewritten
58.77.157.x/24/2917858rewritten
58.77.157.x/24/2817858rewritten
58.77.157.x/24/2717858rewritten
58.77.157.x/24/2617858rewritten
58.77.157.x/24/2517858rewritten
58.77.157.x/24/2417858rewritten
58.77.156.x/24/2317858rewritten
58.77.159.x/24/2217858rewritten
58.77.153.x/24/2117858rewritten
58.77.149.x/24/2017858rewritten
58.77.141.x/24/1917858rewritten
58.77.189.x/24/1817858rewritten
58.77.221.x/24/1717858rewritten
58.77.29.x/24/1617858rewritten
58.76.157.x/24/1523584rewritten
58.79.157.x/24/1417858rewritten
58.73.157.x/24/133786rewritten
58.69.157.x/24/129299rewritten
58.93.157.x/24/114713rewritten
58.109.157.x/24/104804rewritten
58.13.157.x/24/917506rewritten
58.205.157.x/24/84538rewritten

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 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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