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Session Report

Summary:
Test run at: 2021-05-18 16:10:50 GMT
Client Prefix (v4): 143.202.251.x/24
Client AS (v4): 264084
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 /27

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 (143.202.251.x/24) can spoof 31 neighboring addresses (within your /27 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
143.202.251.x/24/31264084yes
143.202.251.x/24/30264084yes
143.202.251.x/24/29264084yes
143.202.251.x/24/28264084yes
143.202.251.x/24/27264084yes
143.202.251.x/24/26264084natblock
143.202.251.x/24/25264084natblock
143.202.251.x/24/24264084natblock
143.202.250.x/24/23264084natblock
143.202.249.x/24/22264084natblock
143.202.255.x/24/21264609natblock
143.202.243.x/24/20262293natblock
143.202.235.x/24/19264082natblock
143.202.219.x/24/18264074natblock
143.202.187.x/24/17264076natblock
143.202.123.x/24/16263543natblock
143.203.251.x/24/15UNROUTEDnatblock
143.200.251.x/24/143128natblock
143.206.251.x/24/1340503natblock
143.194.251.x/24/121541natblock
143.218.251.x/24/11UNROUTEDnatblock
143.234.251.x/24/10786natblock
143.138.251.x/24/9747natblock
143.74.251.x/24/8747natblock

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 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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