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Session Report

Summary:
Test run at: 2020-11-10 10:14:46 GMT
Client Prefix (v4): 140.113.230.x/24
Client AS (v4): 9916 (NCTU-TW)
IPv4 Probes: 75
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 blocked
Routable blocked
Largest spoofable neighbor prefix length /23

Meaning of result status in column:

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 (140.113.230.x/24) can spoof 511 neighboring addresses (within your /23 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
140.113.230.x/24/319916yes
140.113.230.x/24/309916yes
140.113.230.x/24/299916yes
140.113.230.x/24/289916yes
140.113.230.x/24/279916yes
140.113.230.x/24/269916yes
140.113.230.x/24/259916yes
140.113.230.x/24/249916yes
140.113.231.x/24/239916yes
140.113.228.x/24/229916no
140.113.226.x/24/219916no
140.113.238.x/24/209916no
140.113.246.x/24/199916no
140.113.198.x/24/189916no
140.113.166.x/24/179916no
140.113.102.x/24/169916no
140.112.230.x/24/1517716no
140.115.230.x/24/1418420no
140.117.230.x/24/1317713no
140.121.230.x/24/121659no
140.97.230.x/24/11786no
140.81.230.x/24/10UNROUTEDno
140.49.230.x/24/9UNROUTEDno
140.241.230.x/24/827370no

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 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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