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Session Report

Summary:
Test run at: 2017-03-26 01:48:50 GMT
Client Prefix (v4): 61.106.220.x/24
Client AS (v4): 17864 (SKB-TBROAD_HANVIT-AS-KR)
IPv4 Probes: 91
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 (61.106.220.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
61.106.220.x/24/3117864rewritten
61.106.220.x/24/3017864rewritten
61.106.220.x/24/2917864rewritten
61.106.220.x/24/2817864rewritten
61.106.220.x/24/2717864rewritten
61.106.220.x/24/2617864rewritten
61.106.220.x/24/2517864rewritten
61.106.220.x/24/2417864rewritten
61.106.221.x/24/2317864rewritten
61.106.222.x/24/2217864rewritten
61.106.216.x/24/2117864rewritten
61.106.212.x/24/2017864rewritten
61.106.204.x/24/1917864rewritten
61.106.252.x/24/18UNROUTEDrewritten
61.106.156.x/24/174766rewritten
61.106.92.x/24/1617839rewritten
61.107.220.x/24/159457rewritten
61.104.220.x/24/1418302rewritten
61.110.220.x/24/1336408rewritten
61.98.220.x/24/129318rewritten
61.122.220.x/24/1110019rewritten
61.74.220.x/24/104766rewritten
61.42.220.x/24/93786rewritten
61.234.220.x/24/89394rewritten

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 5 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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