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Session Report

Summary:
Test run at: 2021-02-12 06:46:17 GMT
Client Prefix (v4): 220.118.237.x/24
Client AS (v4): 4766 (KIXS-AS-KR)
IPv4 Probes: 66
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 blocked
Routable blocked
Largest spoofable neighbor prefix length /24
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.
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 (220.118.237.x/24) can spoof 255 neighboring addresses (within your /24 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
220.118.237.x/24/314766yes
220.118.237.x/24/304766yes
220.118.237.x/24/294766yes
220.118.237.x/24/284766yes
220.118.237.x/24/274766yes
220.118.237.x/24/264766yes
220.118.237.x/24/254766yes
220.118.237.x/24/244766yes
220.118.236.x/24/234766no
220.118.239.x/24/224766no
220.118.233.x/24/214766no
220.118.229.x/24/204766no
220.118.253.x/24/194766no
220.118.205.x/24/184766no
220.118.173.x/24/174766no
220.118.109.x/24/164766no
220.119.237.x/24/154766no
220.116.237.x/24/144766no
220.114.237.x/24/13UNROUTEDno
220.126.237.x/24/124766no
220.102.237.x/24/112518no
220.86.237.x/24/104766no
220.54.237.x/24/917676no
220.246.237.x/24/84760no

Meaning of status in Received column:

noPackets spoofed from adjacent netblock were not received, probably due to blocking
yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)

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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