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Session Report

Summary:
Test run at: 2021-11-25 17:44:19 GMT
Client Prefix (v4): 201.71.17.x/24
Client AS (v4): 270285
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 /22

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 (201.71.17.x/24) can spoof 1023 neighboring addresses (within your /22 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
201.71.17.x/24/31270285yes
201.71.17.x/24/30270285yes
201.71.17.x/24/29270285yes
201.71.17.x/24/28270285yes
201.71.17.x/24/27270285yes
201.71.17.x/24/26270285yes
201.71.17.x/24/25270285yes
201.71.17.x/24/24270285yes
201.71.16.x/24/23270285yes
201.71.19.x/24/22270285yes
201.71.21.x/24/21270286natblock
201.71.25.x/24/20270290natblock
201.71.1.x/24/19269925natblock
201.71.49.x/24/18270777natblock
201.71.81.x/24/1727652natblock
201.71.145.x/24/1628635natblock
201.70.17.x/24/1517379natblock
201.69.17.x/24/1427699natblock
201.67.17.x/24/138167natblock
201.79.17.x/24/127738natblock
201.87.17.x/24/1119182natblock
201.103.17.x/24/108151natblock
201.7.17.x/24/98167natblock
201.199.17.x/24/811830natblock

Meaning of status in Received column:

yesPackets spoofed from adjacent netblock were received (but that netblock is within the source AS)
natblockSpoofed probe packets appear to be blocked by your local NAT or firewall rather than being rewritten with a public source address.

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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