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Session Report

Summary:
Test run at: 2021-11-25 18:48:05 GMT
Client Prefix (v4): 165.16.208.x/24
Client AS (v4): 37721 (Virtual-Technologies-Solutions-SA)
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 /21

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 (165.16.208.x/24) can spoof 2047 neighboring addresses (within your /21 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
165.16.208.x/24/3137721natblock
165.16.208.x/24/3037721natblock
165.16.208.x/24/2937721natblock
165.16.208.x/24/2837721natblock
165.16.208.x/24/2737721natblock
165.16.208.x/24/2637721natblock
165.16.208.x/24/2537721yes
165.16.208.x/24/2437721yes
165.16.209.x/24/2337721natblock
165.16.210.x/24/2237721natblock
165.16.212.x/24/2137721yes
165.16.216.x/24/2037721natblock
165.16.192.x/24/19327792natblock
165.16.240.x/24/18327808natblock
165.16.144.x/24/1737314natblock
165.16.80.x/24/1637284natblock
165.17.208.x/24/15UNROUTEDnatblock
165.18.208.x/24/14UNROUTEDnatblock
165.20.208.x/24/13UNROUTEDnatblock
165.24.208.x/24/12394917natblock
165.0.208.x/24/1137053natblock
165.48.208.x/24/10UNROUTEDnatblock
165.80.208.x/24/9UNROUTEDnatblock
165.144.208.x/24/85713natblock

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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