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Session Report

Summary:
Test run at: 2020-07-12 14:57:26 GMT
Client Prefix (v4): 190.11.220.x/24
Client AS (v4): 270656
IPv4 Probes: 75
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 rewritten
Routable received
Largest spoofable neighbor prefix length /22

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 (190.11.220.x/24) can spoof 1023 neighboring addresses (within your /22 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
190.11.220.x/24/31270656natblock
190.11.220.x/24/30270656natblock
190.11.220.x/24/29270656yes
190.11.220.x/24/28270656yes
190.11.220.x/24/27270656yes
190.11.220.x/24/26270656yes
190.11.220.x/24/25270656yes
190.11.220.x/24/24270656yes
190.11.221.x/24/23270656yes
190.11.222.x/24/22270656yes
190.11.216.x/24/21270654rewritten
190.11.212.x/24/20270653rewritten
190.11.204.x/24/1927953rewritten
190.11.252.x/24/1827740rewritten
190.11.156.x/24/1713585rewritten
190.11.92.x/24/1627839rewritten
190.10.220.x/24/1514522rewritten
190.9.220.x/24/1413489rewritten
190.15.220.x/24/1327879rewritten
190.3.220.x/24/1227695rewritten
190.27.220.x/24/1119429rewritten
190.43.220.x/24/106147rewritten
190.75.220.x/24/98048rewritten
190.139.220.x/24/87303rewritten

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.
rewrittenThe source address of the probe packets we received differs from the spoofed address. It appears that an intermediate device is rewriting your packet headers.

IPv4 Outbound Filtering Depth:

The tracefilter test found your host able to spoof routable, non-adjacent source addresses through the first 10 IP hop(s).
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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