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Session Report

Summary:
Test run at: 2022-05-25 15:42:04 GMT
Client Prefix (v4): 143.255.12.x/24
Client AS (v4): 265141
IPv4 Probes: 60
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 blocked
Routable blocked
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.
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 (143.255.12.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
143.255.12.x/24/31265141natblock
143.255.12.x/24/30265141natblock
143.255.12.x/24/29265141natblock
143.255.12.x/24/28265141natblock
143.255.12.x/24/27265141natblock
143.255.12.x/24/26265141natblock
143.255.12.x/24/25265141natblock
143.255.12.x/24/24265141natblock
143.255.13.x/24/23265141natblock
143.255.14.x/24/22265141natblock
143.255.8.x/24/21265134natblock
143.255.4.x/24/20264117natblock
143.255.28.x/24/19264644natblock
143.255.44.x/24/18263623natblock
143.255.76.x/24/1761588natblock
143.255.140.x/24/1661512natblock
143.254.12.x/24/153734natblock
143.253.12.x/24/14UNROUTEDnatblock
143.251.12.x/24/13UNROUTEDnatblock
143.247.12.x/24/12UNROUTEDnatblock
143.239.12.x/24/111213natblock
143.223.12.x/24/1033371natblock
143.191.12.x/24/9UNROUTEDnatblock
143.127.12.x/24/8UNROUTEDnatblock

Meaning of status in Received column:

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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