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Session Report

Summary:
Test run at: 2019-01-26 21:29:02 GMT
Client Prefix (v4): 173.15.214.x/24
Client AS (v4): 7922 (COMCAST-7922)
IPv4 Probes: 124
Outbound spoofing summary (from the client to our server)
Source address type IPv4
Private - RFC1918 blocked
Routable received
Largest spoofable neighbor prefix length /9
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.

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 (173.15.214.x/24) can spoof 8388607 neighboring addresses (within your /9 prefix)


Spoofed source address (anon)Prefix
Length
ASN of spoofed
source address
Received
173.15.214.x/24/317922natblock
173.15.214.x/24/307922natblock
173.15.214.x/24/297922natblock
173.15.214.x/24/287922yes
173.15.214.x/24/277922natblock
173.15.214.x/24/267922yes
173.15.214.x/24/257922yes
173.15.214.x/24/247922natblock
173.15.215.x/24/237922yes
173.15.212.x/24/227922yes
173.15.210.x/24/217922yes
173.15.222.x/24/207922natblock
173.15.198.x/24/197922yes
173.15.246.x/24/187922yes
173.15.150.x/24/177922yes
173.15.86.x/24/167922natblock
173.14.214.x/24/157922yes
173.13.214.x/24/147922yes
173.11.214.x/24/137922yes
173.7.214.x/24/121239yes
173.31.214.x/24/1130036yes
173.47.214.x/24/10UNROUTEDnatblock
173.79.214.x/24/9701yes
173.143.214.x/24/81239natblock

Meaning of status in Received column:

yesPackets spoofed from adjacent netblock were received
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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