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Session Report

Summary:
Test run at: 2021-03-25 14:20:53 GMT
Client Prefix (v4): 199.87.154.x/24
Client AS (v4): 18451 (LESNET)
IPv4 Probes: 66
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 unknown
Routable unknown
Largest spoofable neighbor prefix length none

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.

Warnings:

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 (199.87.154.x/24) can spoof 0 neighboring addresses


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
199.87.154.x/24/3118451natblock
199.87.154.x/24/3018451natblock
199.87.154.x/24/2918451natblock
199.87.154.x/24/2818451natblock
199.87.154.x/24/2718451natblock
199.87.154.x/24/2618451natblock
199.87.154.x/24/2518451natblock
199.87.154.x/24/2418451natblock
199.87.155.x/24/2318451natblock
199.87.152.x/24/2218451natblock
199.87.158.x/24/21394081natblock
199.87.146.x/24/2027537natblock
199.87.138.x/24/1932281natblock
199.87.186.x/24/1832524natblock
199.87.218.x/24/1733459natblock
199.87.26.x/24/1619445natblock
199.86.154.x/24/155006natblock
199.85.154.x/24/14UNROUTEDnatblock
199.83.154.x/24/1322995natblock
199.95.154.x/24/123356natblock
199.71.154.x/24/11577natblock
199.119.154.x/24/1022646natblock
199.23.154.x/24/9UNROUTEDnatblock
199.215.154.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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