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Session Report

Summary:
Test run at: 2020-10-25 16:56:58 GMT
Client Prefix (v4): 208.81.2.x/24
Client AS (v4): 18451 (LESNET)
IPv4 Probes: 75
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 blocked
Routable blocked
Largest spoofable neighbor prefix length /25

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 (208.81.2.x/24) can spoof 127 neighboring addresses (within your /25 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
208.81.2.x/24/3118451yes
208.81.2.x/24/3018451natblock
208.81.2.x/24/2918451yes
208.81.2.x/24/2818451yes
208.81.2.x/24/2718451yes
208.81.2.x/24/2618451yes
208.81.2.x/24/2518451yes
208.81.2.x/24/2418451natblock
208.81.3.x/24/2318451natblock
208.81.0.x/24/2218451natblock
208.81.6.x/24/2118451natblock
208.81.10.x/24/2030400natblock
208.81.18.x/24/19UNROUTEDnatblock
208.81.34.x/24/1819240natblock
208.81.66.x/24/17205272natblock
208.81.130.x/24/16UNROUTEDnatblock
208.80.2.x/24/15397512natblock
208.83.2.x/24/14395336natblock
208.85.2.x/24/1340244natblock
208.89.2.x/24/1216908natblock
208.65.2.x/24/1136143natblock
208.113.2.x/24/1021570natblock
208.17.2.x/24/91239natblock
208.209.2.x/24/8701natblock

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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